⑴ c语言学生成绩管理系统
这么多功能，网上查查有没有例子； 如果没有，只能付费让别人做了
⑵ 毕业设计管理系统的c语言实现
想当年我做的课题就是这个，几乎一模一样。到现在我还保留这源代码呢，珍贵的资料啊。
⑶ 基于C语言的学生成绩管理系统的研究意义与发展
你要的是论文？
⑷ 求一篇人事管理系统的毕业论文，附上C语言编写的可运行程序代码
你好的！
⑴ 首先就不要有马上毕业，最后一次花点钱就得了的想法
⑵ 只有自己写论文，做设计才能顺利的毕业
⑶ 在这里我给出方法，以及相关资料寻找的网址，请认真阅读
⑷ 否则，真的可能导致预想不到的后果！
====================================================================
❶ 中国知网也好、万方数据也好都有大量的原创论文！
❷ 并且，大部分的院校都有免费的接口！
❸ 如果真没有免费的接口，那就网络知道悬赏求助下载吧！
❹ 要是要外文的论文准备翻译的话，最好的办法就是【谷歌学术】
❺ 需要什么语言的论文直接就用相应的语言搜索！100% 能找到类似的！
❻ 源代码：51cto或者CSDN下载！
【友情提示】==================论文写作方法===========================
❶ 其实，原创的论文网上没有免费为你代谢的！谁愿意花时间给你写这个呢？难道你在空闲的时间原以为别人提供这种毫无意义的服务么？所以：还不如自己写。主要是网上的不可靠因素太多，万一碰到骗人的，就不上算了。
❷ 写作论文的简单方法，首先大概确定自己的选题【这个很可能老师已经给你确定了】，然后在网上查找几份类似的文章。
❸ 通读一些相关资料，对这方面的内容有个大概的了解！看看别人都从哪些方面写这个东西！
❹ 参照你们学校的论文的格式，列出提纲，接着要将提纲给你们老师看看，再修改。等老师同意你这个提纲之后，你就可以补充内容！
❺ 也可以把这几份论文综合一下，从每篇论文上复制一部分，组成一篇新的文章！然后把按自己的语言把每一部分换下句式或词，经过换词不换意的办法处理后,网上就查不到了！
❻ 最后，到万方等数据库进行检测【这里便宜啊，每一万字才1块钱】，将扫红部分进行再次修改！
❼ 祝你顺利完成论文!
⑸ c语言学生成绩管理系统求个原创！
http://blog.csdn.net/odaynot/article/details/7942497
这个是我写的，你可以看看。
⑹ 学生信息管理系统(C语言版)
#include "stdio.h"
#include "bios.h"
#include "conio.h"
#include "STRING.H"
#include "DOS.h"
#include "process.h"
#include "stdlib.h"
#include "math.h"
#define key_down 80
#define key_up 72
#define key_esc 1
#define key_alt_f 33
#define key_alt_x 45
#define key_enter 28
#define key_alt_c 46
#define key_alt_e 18
#define key_alt_s 31
#define key_alt_d 32
#define key_alt_r 19
#define key_alt_p 25
#define key_alt_o 24
struct student
{
char name[20];
long num;
char age[2];
char sex[4];
char xibie[16];
char jiguan[50];
struct{
float chinese;
float english;
float math;
float total;
float ave;}score;
struct student *next;
};
struct student agent[50];
struct student *head,*this1,*new1,*new2,*stud;
char numstr[40]={' ',' '};
int n=0;
int r=0;
int k=0;
long num;
int get_key();
void box(int startx,int starty,int high,int width);
void new1name(void),listall(void),wfile(void),rfile(void);
struct student *insert(struct student *head ,struct student *stud);
void cjlr(),cjtj(),cjpx(),cxxs(),list(),cxcj();
void del();
int mmm();
int nnn();
void ab();
mmm()
{char aaa[6],bbb[6];
char d; //int r=0;
int i=0;
FILE *fp;
char a[6];
char b[6];
clrscr();
if((fp=fopen("file1","r"))==NULL)
{ window(1,1,80,25);
textbackground(1);
textcolor(0);
clrscr();
window(20,8,60,20);
textbackground(14);
textcolor(0);
clrscr();
gotoxy(8,2);
cprintf("NO UER!");
fclose(fp);
fp=fopen("file1","w");
gotoxy(2,4);
printf("Please input name:");
gets(a);fwrite(a,6,1,fp);
gotoxy(2,8);
printf("Please input key:");
gets(b); fwrite(b,6,1,fp);
fclose(fp);
ab();
}
else
{ window(1,1,80,25);
textbackground(1);
textcolor(0);
clrscr();
window(20,8,60,20);
textbackground(14);
textcolor(0);
clrscr();
gotoxy(8,2);
cprintf("Input Your Name And Password:");
gotoxy(2,8);
cprintf(" PWD:");
gotoxy(2,4);
cprintf("NAME:");
scanf("%s",aaa);
gotoxy(7,8);
while(d=getch())
{
if(d==13)
break;
cprintf("*");
bbb[i]=d;
i++;
}
fp=fopen("file1","r");
fread(a,6,1,fp);
fread(b,6,1,fp);
fclose(fp);
for(i=0;i<=5;i++)
{
if(aaa[i]!=a[i] || bbb[i]!=b[i])
exit(0);
}
}
ab();
}
nnn()
{union REGS inregs ,outregs;
inregs.h.ah=0x2a;
intdos(&inregs,&outregs);
window(60,24,80,25);
textbackground(14);
textcolor(0);
clrscr();
cprintf("Data is 2004-%d-%d.\n",outregs.h.dh,outregs.h.dl);
return 0;
}
void ab()
{int i;
clrscr();
window(1,1,80,25);
textbackground(1);
textcolor(0);
clrscr();
window(20,8,62,20);
textbackground(14);
textcolor(128);
clrscr();
for(i=0;i<=11;i++)
{window(20,8+i,62,9+i);
textbackground(i);
textcolor(128+i*2);
clrscr();
cprintf(" Welcome To Students Management System!");
}
getch();
}
main()
{int i,key,x,y,l;
char *menu[]={"input(F)","print1(O)","del(D)","find(C)","print(P)","save(S)","exit(X)"};
char *red[]={"input","printf1","del","find","print","cpoy","exit"};
char *f[]={"xueji luru","chengji luru","chenji tongji","add student","chengji paixu"};
char *c[]={"student","chengji"};
char buf[16*10*4],buf1[16*4];
struct student *stud;
if(k++==0)
mmm();
window(1,2,80,25);
textbackground(15);
textcolor(0);
clrscr();
textbackground(1);
clrscr();
window(1,1,80,1);
textbackground(15);
textcolor(0);
clrscr();
window(1,1,80,2);
gotoxy(1,1);
for(i=0,l=0;i<7;i++)
{x=wherex();
y=wherey();
cprintf(" %s",menu[i]);
l=strlen(menu[i]);
gotoxy(x,y);
textcolor(RED);
cprintf(" %s",red[i]);
x=x+l+4;
gotoxy(x,y);
textcolor(BLACK);
}
nnn();
if(r++==0)
main();
window(1,2,80,25);
while(1)
{
key=0;
while(bioskey(1)==0);
key=get_key();
if(key==key_alt_x) exit(0) ;
if(key==key_alt_s) wfile();
if(key==key_alt_d) del();
if(key==key_alt_r) rfile();
if(key==key_alt_p) listall();
if(key==key_alt_o) list();
if(key==key_alt_f)
{textbackground(0);
textcolor(15);
gotoxy(4,1);
cprintf("%s",menu[0]);
gettext(4,2,18,12,buf);
window(4,2,18,8);
textbackground(15);
textcolor(0);
clrscr();
window(4,2,19,9);
box(1,1,7,16);
for(i=2;i<7;i++)
{gotoxy(2,i);
cprintf("%s",f[i-2]);}
gettext(2,2,18,3,buf1);
textbackground(0);
textcolor(15);
gotoxy(2,2);
cprintf("%s",f[0]);
y=2;
key=get_key();
while(key!=key_alt_x && key!=key_enter && key!=key_esc)
{if(key==key_up || key==key_down)
{puttext(2,y,18,y+1,buf1);
if(key==key_up)
y=y==2?6:y-1;
if(key==key_down)
y=y==6?2:y+1;
gettext(2,y,18,y+1,buf1);
textbackground(0);
textcolor(15);
gotoxy(2,y);
cprintf("%s",f[y-2]);
}
key=get_key();
}
if(key==key_alt_x) exit(0);
if(key==key_enter)
{switch(y-1)
{case 1 : new1name();break;
case 2 : cjlr();break;
case 3 : cjtj();break;
case 4 : insert(head,stud);break;
case 5 : cjpx();break;
default : break;
}
}
}
else
{
window(1,1,80,1);
puttext(2,2,19,10,buf);
textbackground(15);
textcolor(0);
gotoxy(4,1);
cprintf("%s",menu[0]);
}
if(key==key_alt_c)
{textbackground(0);
textcolor(15);
gotoxy(39,1);
cprintf("%s",menu[3]);
gettext(39,2,50,7,buf1);
window(39,2,49,5);
textbackground(15);
textcolor(0);
clrscr();
window(39,2,49,6);
box(39,1,4,11);
for(i=2;i<4;i++)
{
gotoxy(2,i);
cprintf("%s",c[i-2]);
}
gettext(39,2,49,3,buf1);
textbackground(0);
textcolor(15);
gotoxy(2,2);
cprintf("%s",c[0]);
y=2;
key=get_key();
while(key!=key_alt_x&&key!=key_enter&&key!=key_esc)
{if(key==key_up||key==key_down)
{puttext(39,y,49,y+1,buf1);
if(key==key_up)
y=y==2?3:y-1;
if(key==key_down)
y=y==3?2:y+1;
gettext(39,y,49,y+1,buf1);
textbackground(0);
textcolor(15);
gotoxy(2,y);
cprintf("%s",c[y-2]);
}
key=get_key();
}
if(key==key_alt_x) exit(0);
if(key==key_enter)
{switch(y-1)
{case 1: cxxs();break;
case 2: cxcj();break;
default:break;
}
}
}
else
{window(1,1,80,2);
puttext(39,2,49,7,buf);
textbackground(15);
textcolor(0);
gotoxy(39,1);
cprintf("%s",menu[3]);
}
} }
int get_key()
{ union REGS rg;
rg.h.ah=0;
int86(0x16,&rg,&rg);
return rg.h.ah;
}
void box(int startx,int starty,int high,int width)
{ int i;
gotoxy(startx,starty);
putch(0xda);
for(i=starty+1;i<width;i++)
putch(0xc4);
putch(0xbf);
for(i=starty+1;i<high;i++)
{gotoxy(startx,i);
putch(0xb3);
gotoxy(width,i);putch(0xb3);}
gotoxy(startx+1,width);
putch(0xc0);
for(i=startx+1;i<width;i++)
putch(0xc4);
putch(0xd9);
return;
}
/* void new1name(void)
{ int key;
window(1,2,80,25);
textbackground(BLUE);
clrscr();
cprintf("Are you sure input?");
key=get_key();
while(key!=key_alt_x && key!=key_esc)
{
window(1,2,80,25);
textbackground(BLUE);
clrscr();
new1=new2=(struct student *)malloc(sizeof(struct student));
if(head==NULL)
head=new1;
else
{ this1=head;
while(this1->next!=NULL)
this1=this1->next;
this1->next=new1;
}
this1=new1;
printf("\nRecord%d:",n+1);
printf("\nXing Ming:");
gets(this1->name);
printf("\nXue Hao:");
gets(numstr);
this1->num=atol(numstr);
printf("\nNian Ling:");
gets(this1->age);
printf("\nXing Bie:");
gets(this1->sex);
printf("\nXue Yuan:");
gets(this1->xibie);
printf("\nJi Guan:");
gets(this1->jiguan);
n++;
this1->next=NULL;
printf("Are you sure input :Y/N?");
if(getch()=='n')
main();
else
new1name();
}
} */
void new1name(void)
{ int key;
char a;
window(1,2,80,25);
textbackground(BLUE);
clrscr();
cprintf("Are you sure input?");
key=get_key();
while(key!=key_alt_x && key!=key_esc)
{
window(1,2,80,25);
textbackground(BLUE);
clrscr();
new1=new2=(struct student *)malloc(sizeof(struct student));
if(head==NULL)
head=new1;
else
{ this1=head;
while(this1->next!=NULL)
this1=this1->next;
this1->next=new1;
}
this1=new1;
printf("\nRecord%d:",n+1);
printf("\nXing Ming:");
gets(&a);
gets(this1->name);
printf("\nXue Hao:");
gets(numstr);
this1->num=atol(numstr);
printf("\nNian Ling:");
gets(this1->age);
printf("\nXing Bie:");
gets(this1->sex);
printf("\nXue Yuan:");
gets(this1->xibie);
printf("\nJi Guan:");
gets(this1->jiguan);
n++;
this1->next=NULL;
printf("Are you sure input :Y/N?");
if(getch()=='n')
main();
else
new1name();
}
main();
}
/**/
void listall(void)
{
int i=0;
window(1,2,80,25);
textbackground(1);
textcolor(0);
clrscr();
if(head==NULL)
{cprintf("\nempty list .\n");return;
}
this1=head;
do
{ cprintf("\nrecord number %d\n",++i);
cprintf(" name:%s",this1->name);
cprintf(" number:%ld",this1->num);
cprintf(" age:%s",this1->age);
cprintf(" sex:%s",this1->sex);
cprintf(" xibie:%s",this1->xibie);
cprintf(" jiguan:%s",this1->jiguan);
cprintf(" chinese:%6.2f",this1->score.chinese);
cprintf(" english:%6.2f",this1->score.english);
cprintf(" math:%6.2f",this1->score.math);
cprintf(" total:%6.2f",this1->score.total);
cprintf(" ave:%6.2f\n",this1->score.ave);
this1=this1->next;
//this1->next=NULL;
}while(this1!=NULL);
getch();
main();
}
//*insert
struct student *insert(struct student *head,struct student *stud)
{
struct student *p0,*p1,*p2;
p1=head;
p0=stud;
if(head==NULL)
{head=p0;p0->next=NULL;}
else
while((p0->num>p1->num) && (p1->next!=NULL))
{p2=p1;p1=p1->next;}
if(p0->num<=p1->num)
{if(head==p1)
{head=p0;
p0->next=p1;
}
else
{p2->next=p0;
p1->next=p1;
}
}
else
{p1->next=p0;
p0->next=NULL;
}
n=n+1;
return(head);
}
void wfile(void)
{FILE *fptr;
char a[10];
if(n<1)
{printf("\nCan't write empty list.\n");return;}
// char a[10];
cprintf("Please input filename:");
gets(a);
if((fptr=fopen(a,"wb"))==NULL)
printf("\nCant' open file agents.rec\n");
else
{this1=head;
while(this1->next!=NULL)
{fwrite(this1,sizeof(struct student ),1,fptr);
this1=this1->next;
}
// fwrite(this1,sizeof(struct student ),1,fptr);
fclose(fptr);
printf("\nFile of %d records have writen.\n",n);
}
getch();
main();
}
//*rfile
void rfile(void)
{FILE *fptr;
char b[10];
cprintf("Please input filename:");
gets(b);
if((fptr=fopen(b,"rb"))==NULL)
printf("\nCan't open file %s\n",b);
else
{n=0;
head=(struct student *)malloc(sizeof(struct student));
this1=head;
fread(this1,sizeof(struct student),1,fptr);
n++;
while(1)
{if(feof(fptr))
{fclose(fptr);
this1->next=NULL;printf("\nFile read.Total agents is now %d.\n",n);
getch(); main() ;
}else{
this1->next=(struct student *)malloc(sizeof(struct student));
this1=this1->next;
fread(this1,sizeof(struct student),1,fptr);
n++;
}} this1->next=NULL;
//fread(this1,sizeof(struct student),1,fptr);
//n++;
fclose(fptr);
printf("\nFile read.Total agents is now %d.\n",n);
}
getch();
main();
}
//*wfile
/*void wfile(void)
{char a[10];
FILE *fptr;
if(n<1)
{printf("\nCan't write empty list.\n");return;}
cprintf("Please input filename:");
gets(a);
if((fptr=fopen(a,"wb"))==NULL)
{cprintf("\nCant' open file ");puts(a);cprintf("\n");
}
else
{fwrite(agent,sizeof(struct student ),n,fptr);
fclose(fptr);
printf("\nFile of %d records writen.\n",n);
}
getch();
main();
}
//*rfile
void rfile(void)
{FILE *fptr;
char a[10];
cprintf("Please input filename:");
gets(a);
if((fptr=fopen(a,"wb"))==NULL)
{cprintf("\nCan't open file ");puts(a);
}
else
{while(fread(&agent[n],sizeof(agent[n]),1,fptr)==1)
n++;
fclose(fptr);
printf("\nFile read.Total agents is now %d.\n",n);
}
getch();
main();
} */
//*cjlr
void cjlr(void)
{struct student *p1;
long num; char ddd[5];
char ccc[5];
window(1,2,80,25);
textbackground(BLUE);
clrscr();
p1=head;
printf("input the student' number:");
scanf("%ld",&num);
if(head==NULL)
{
printf("\nlist null!\n");
}
p1=head;
while(num!=p1->num && p1->next!=NULL)
{p1=p1->next;}
if(p1->num==num)
{printf("chinese:");
scanf("%f",&p1->score.chinese);
// gets(ccc);printf("\n");
// p1->score.chinese=atof(ccc);
printf("english:");
scanf("%f",&p1->score.english);
// gets(numstr);
//p1->score.english=atof(numstr);
//getch();
printf("math:");
scanf("%s",ddd);
// gets(ddd);
p1->score.math=atof(ddd);
p1->score.total=p1->score.chinese+p1->score.english+p1->score.math;
p1->score.ave=(p1->score.chinese+p1->score.english+p1->score.math)/3.0;
}
getch();
main();
}
//*cjlr
/*void cjlr(void)
{struct student *p1;
long num; char ddd[4];
window(1,2,80,25);
textbackground(BLUE);
clrscr();
p1=head;
printf("input the student' number:");
scanf("%ld",&num);
if(head==NULL)
{
printf("\nlist null!\n");
}
p1=head;
while(num!=p1->num && p1->next!=NULL)
{p1=p1->next;}
if(p1->num==num)
{printf("chinese:");
scanf("%f",p1->score.chinese);
//gets(numstr);
//p1->score.chinese=atof(numstr);
//getch();
printf("english:");
scanf("%f",p1->score.english);
//gets(numstr);
//p1->score.english=atof(numstr);
// getch();
printf("math:");
//scanf("%f",p1->score.math);
gets(ddd);
p1->score.math=atof(ddd);
p1->score.ave=(p1->score.chinese+p1->score.english+p1->score.math)/3.0;
getch();
}
getch();
main();
} */
//*del
void del()
{struct student *p1,*p2;
long num;
window(1,2,80,25);
textbackground(BLUE);
clrscr();
printf("input the del student' number:");
scanf("%ld",&num);
if(head==NULL)
{
printf("\nlist null!\n"); exit(1);
}
p1=head;
while(num!=p1->num && p1->next!=NULL)
{p2=p1;p1=p1->next;
}
if(num==p1->num)
{if(p1==head) head=p1->next;
else
p2->next=p1->next;
printf("the %ld message have del\n",num);
n=n-1;
}
else
printf("No find %ld!\n",num);
getch();
main();
}
//
void cjtj(void)
{struct student *p;
for(p=head;p!=NULL;p=p->next)
{ p->score.total=p->score.chinese+p->score.english+p->score.math;
p->score.ave=p->score.total/3.0;
}
}
//
void cjpx(void)
{
struct student *p,*p1;
int i,j,t;
float temp;
for(i=0;i<n;i++)
{
p=head;
p1=p->next;
if(p->score.total<p1->score.total)
{temp=p->score.total;
p->score.total=p1->score.total;
p1->score.total=temp;
}
}
}
//
void cxxs(void)
{ struct student *p;
char name1[20];
window(1,2,80,25);
textbackground(BLUE);
clrscr();
printf("shu ru yao cha xun de xue sheng de xing ming:");
gets(name1);
for(p=head;p!=NULL;p=p->next)
{if(strcmp(p->name,name1)==0)
{printf("xingming:%s\n",p->name);
printf("xuehao:%ld\n",p->num);
printf("nianling:%s\n",p->age);
printf("xingbie:%s\n",p->sex);
printf("xibie:%s\n",p->xibie);
printf("jiguan:%s\n",p->jiguan);
}
} getch();
main();
}
/*chaxunchengji*/
void cxcj(void)
{ struct student *p;
char name2[20]; int i;
window(1,2,80,25);
textbackground(BLUE);
clrscr();
printf("shu ru yao cha xu de xue sheng de xingming:");
gets(name2);
for(p=head;p!=NULL;p=p->next)
{if(strcmp(p->name,name2)==0)
{printf("xingming:%s\n",p->name);
printf("chinese:%6.2f\n",p->score.chinese);
printf("english:%6.2f\n",p->score.english);
printf("math:%6.2f\n",p->score.math);
printf("total:%6.2f\n",p->score.total);
printf("ave:%6.2f\n",p->score.ave);
}
}getch();
main();
}
/*dayingmugexueshen*/
void list(void)
{ char name3[20];
int i=0;
window(1,2,80,25);
textbackground(BLUE);
clrscr();
printf("shu ru yao da ying de xue sheng xingming:");
gets(name3);
if(head==NULL)
{ printf("\nempty list.\n");
return;
}
for(this1=head;this1!=NULL;this1=this1->next)
{
if(strcmp(this1->name,name3)==0)
{printf("\nnrecord number %d\n",++i);
printf("xingmming:%s\n",this1->name);
printf("xuehao:%ld\n",this1->num);
printf("nianling:%d\n",this1->age);
printf("xingbie:%s\n",this1->sex);
printf("xueyuan:%s\n",this1->xibie);
printf("jiguan:%s\n",this1->jiguan);
printf("chinese:%6.2f\n",this1->score.chinese);
printf("english:%6.2f\n",this1->score.english);
printf("math:%6.2f\n",this1->score.math);
printf("total:%6.2f\n",this1->score.total);
printf("ave:%6.2f\n",this1->score.ave);
}
} getch();
main();
}
⑺ C语言学生信息管理系统程序相映论文!!
#ifndef H_STUDENT_HH
#define H_STUDENT_HH
#include "stdio.h"
#include "string.h"
#include "malloc.h"
#define LEN sizeof(struct message_student) /*一个结构体数组元素的长度*/
#define numsubs 5 /*学科数目*/
typedef struct message_student /*结构体定义*/
{
char number[6];
char name[20];
char sex[4];
float subject[numsubs];
float score;
float average;
int index;
}student;
extern int numstus; /*学生数目*/
extern student *pointer; /*指向结构体数组*/
extern int lens;
int menu_select(); /*函数声明*/
int openfile(student stu[]);
int findrecord(student stud[]);
int writetotext(student stud[]);
void welcome();
void display1();
void showtable();
void sort(student stu[]);
void deleterecord(student stu[],int i);
void addrecord(student stud[]);
void display(student stud[],int n1,int n2);
void amendrecord(student stud[]);
void count(student stud[]);
void sortnum(student stud[]);
void sortnum2(student stud[]);
void sortname(student stud[]);
void sortname2(student stud[]);
void sortcount(student stud[]);
void sortcount2(student stud[]);
void statistic(student stud[]);
void display1();
#endif
//#include "head.h"
int menu_select()
{
char c;
printf("\n\n");
printf(" | 1. 增加学生记录 5.统计信息 |\n");
printf(" | 2. 查询学生记录 6.打开文件 |\n");
printf(" | 3. 修改学生记录 7.保存文件 |\n");
printf(" | 4. 学生纪录排序 8.显示记录 |\n");
printf(" | 0.退出系统 |\n");
printf("\n\n");
printf("请选择(0-8):");
c=getchar();
getchar();
return (c-'0');
}
//#include "head.h"
int findrecord(student stud[]) /*查找信息*/
{
char str[2];
int i,num;
if(numstus==0)
{
printf("没有可被查找的记录\n");
return -1;
}
else
{
printf("以何种方式查找？\n1.学号\t2.姓名\t3.名次\n");
gets(str);
if(str[0]=='1') /*按学号查找*/
{
printf("请输入学号:");
gets(str);
for(i=0;i<=numstus;i++)
if(strcmp(str,stud[i].number)==0)
{
display(stud,i,i);
break;
}
else continue;
}
else if(str[0]=='2') /*按姓名查找*/
{
printf("请输入姓名:");
gets(str);
for(i=0;i<=numstus;i++)
if(strcmp(str,stud[i].name)==0)
{
display(stud,i,i);
break;
}
else continue;
}
else if(str[0]=='3') /*按名次查找*/
{
printf("请输入名次:");
scanf("%d",&num);
getchar();
for(i=0;i<=numstus;i++)
if(num==stud[i].index)
{
display(stud,i,i);
break;
}
else continue;
}
if(i>numstus)
{
printf("没有查找所要的信息。\n");
return -1;
}
return i;
}
}
//#include"head.h"
int openfile(student stu[])
{
int i=0,j;
FILE *fp;
char filename[20],str[2];
if(numstus!=0)
{
printf("已经有记录存在，是否保存?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
writetotext(stu);
}
printf("请输入文件名:");
gets(filename);
numstus=0;
if((fp=fopen(filename,"rb+"))==NULL)
{
printf("无法打开该文件\n");
return(-1);
}
fscanf(fp,"%d",&numstus);
fgetc(fp);
while(i<numstus)
{
fscanf(fp,"%s",stu[i].number);
fscanf(fp,"%s",stu[i].name);
fscanf(fp,"%s",stu[i].sex);
for(j=0;j<numsubs;j++)
fscanf(fp,"%f",&stu[i].subject[j]);
fscanf(fp,"%f",&stu[i].score);
fscanf(fp,"%f",&stu[i].average);
fscanf(fp,"%d",&stu[i].index);
i++;
}
fclose(fp);
printf("文件读取成功\n");
printf("是否显示纪录?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
display(stu,0,numstus-1);
return(0);
}
//#include "head.h"
void sort(student stud[])
{
int i,j=0;
char str[5];
student *p;
p=stud;
if(numstus==0)
{
printf("没有可供查询的记录!");
}
while(1)
{
for(i=0;;i++)
{
printf(" 请输入查询方式:");
printf("（直接输入回车则结束查询操作）\n");
printf("1.按照学号\t");
printf("2.按照姓名\t");
printf("3.按照名次\n");
gets(str);
if(strlen(str)==0) break;
if(str[0]=='1')
{
printf("请输入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortnum2(p);
else
sortnum(p);
display(stud,0,numstus-1);
}
else if(str[0]=='2')
{
printf("请输入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortname2(p);
else
sortname(p);
display(stud,0,numstus-1);
}
else if(str[0]=='3')
{
printf("请输入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortcount2(p);
else
sortcount(p);
display(stud,0,numstus-1);
}
else printf("请输入1~3");
printf("是否退出排序?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y') break;
}
return;
}
}
void sortnum(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j+1].number,stud[j].number)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortnum2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j].number,stud[j+1].number)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortname(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j+1].name,stud[j].name)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortname2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j].name,stud[j+1].name)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortcount(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(stud[j+1].index>stud[j].index)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortcount2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(stud[j].index>stud[j+1].index)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
//#include"head.h"
void statistic(student stud[]) /*新增功能，输出统计信息*/
{
int i,j=0,k=0;
char c1,str[2];
float average[numsubs],sum=0;
if(numstus==0)
printf("没有可被查找的记录\n");
else
{
while(1)
{
printf("下面将统计考试成绩\n");
printf("请选择你要统计哪科的成绩 1.A\t2.B\t3.C\t4.D\t5.E\n");
c1=getchar();
printf("\t一共有个%d记录\n",numstus); /*总共记录数*/
switch(c1)
{
case '1':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[0];
if(stud[k].subject[0]>stud[i].subject[0]) k=i;
if(stud[j].subject[0]<stud[i].subject[0]) j=i;
}
average[0]=sum/numstus;
printf("\t科目A的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[0]);
printf("\t科目A的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[0]);
printf("\t科目A的平均分是 %5.2f\n",average[0]); /*平均分*/
break;
case '2':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[1];
if(stud[k].subject[1]>stud[i].subject[1]) k=i;
if(stud[j].subject[1]<stud[i].subject[1]) j=i;
}
average[1]=sum/numstus;
printf("\t科目B的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[1]);
printf("\t科目B的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[1]);
printf("\t科目B的平均分是 %5.2f\n",average[1]); /*平均分*/
break;
case '3':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[2];
if(stud[k].subject[2]>stud[i].subject[2]) k=i;
if(stud[j].subject[2]<stud[i].subject[2]) j=i;
}
average[2]=sum/numstus;
printf("\t科目C的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[2]);
printf("\t科目C的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[2]);
printf("\t科目C的平均分是 %5.2f\n",average[2]); /*平均分*/
break;
case '4':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[3];
if(stud[k].subject[3]>stud[i].subject[3]) k=i;
if(stud[j].subject[3]<stud[i].subject[3]) j=i;
}
average[3]=sum/numstus;
printf("\t科目D的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[3]);
printf("\t科目D的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[3]);
printf("\t科目D的平均分是 %5.2f\n",average[3]); /*平均分*/
break;
case '5':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[4];
if(stud[k].subject[4]>stud[i].subject[4]) k=i;
if(stud[j].subject[4]<stud[i].subject[4]) j=i;
}
average[4]=sum/numstus;
printf("\t科目E的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[4]);
printf("\t科目E的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[4]);
printf("\t科目E的平均分是 %5.2f\n",average[4]); /*平均分*/
break;
default:printf("输入错误！请输入1~5之间的数\n");
}
sum=0;
getchar();
printf("是否继续进行统计?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y') ;
else break;
}
}
}
int writetotext(student stud[]) /*将所有记录写入文件*/
{
int i=0,j;
FILE *fp;
char filename[20];
printf("输入文件名称:");
gets(filename);
fp=fopen(filename,"w");
fprintf(fp,"%d\n",numstus);
while(i<numstus)
{
fprintf(fp,"%s %s %s ",stud[i].number,stud[i].name,stud[i].sex);
for(j=0;j<numsubs;j++)
fprintf(fp,"%f ",stud[i].subject[j]);
fprintf(fp,"%f %f %d ",stud[i].score,stud[i].average,stud[i].index);
i++;
}
fclose(fp);
printf("已成功存储!\n");
display(stud,0,numstus-1);
numstus=0;
return 0;
}
void welcome()
{
printf("\t*************************************************************\n");
printf("\t\t\t\t这是一个学生成绩管理系统\n\t\t\t\t 倾情奉献 欢迎使用!\n");
printf("\t*************************************************************\n");
}
void showtable()
{
printf("---------------------------------------------------------------------------------------\n");
printf("学号\t姓名\t性别\tA\tB\tC\tD\tE\t总分\t平均分\t名次\n");
printf("---------------------------------------------------------------------------------------\n");
}
void display(student stud[],int n1,int n2)
{
int i;
showtable(); /*显示表头*/
for(i=n1;i<=n2;i++)
printf("%s\t%s\t%s\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%d\t\n",stud[i].number,stud[i].name,stud[i].sex,stud[i].subject[0],stud[i].subject[1],stud[i].subject[2],stud[i].subject[3],stud[i].subject[4],stud[i].score,stud[i].average,stud[i].index);
/*通过循环输出数据*/
}
void display1()
{
printf("\t\t本系统由计应精英一组亲情制作\n\n");
printf("\t\t制作人员列表: (按比划)\n");
printf("\t\t王庆斌\t\t\t张威\n\t\t李智\t\t\t周在峰\n\t\t杨凯\t\t\t胡杨\n");
printf("\n\n");
getchar();
}
#include<string.h>
void amendrecord(student stud[])
{
char str[5]; /*供用户输入*/
int i=-1,j;
if(numstus==0) /*没有记录返回*/
printf("没有可供修改的记录！");
while(i<0)
{
i=findrecord(stud);
if(i>=0)
{
printf("要删除这个学生的信息吗?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
{
deleterecord(stud,i);
count(stud);
}
else
{
printf("确定要修改这个学生的信息吗?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
{
printf("下面请重新输入学生的信息:\n");
printf("请输入学号:");
gets(stud[i].number);
printf("请输入姓名:");
gets(stud[i].name);
printf("请输入性别(男/女 1/0):");
gets(str);
if(str[0]=='0')
strcpy(stud[i].sex,"女");
else
strcpy(stud[i].sex,"男");
stud[i].score=0;
printf("请按顺序输入成绩:");
for(j=0;j<numsubs;j++)
{
scanf("%f",&stud[i].subject[j]);
stud[i].score+=stud[i].subject[j];
}
getchar();
stud[i].average=stud[i].score/numsubs;
}
count(stud);
}
display(stud,0,numstus-1);
}
printf("是否继续进行其他修改?(y/n)\n");
gets(str);
if(str[0]=='y'||str[0]=='Y')
i=-1;
else i=1;
}
}
void deleterecord(student stu[],int i) /*删除信息*/
{
int j;
while(i>=0)
{
for(j=i;j<numstus;j++)
stu[j]=stu[j+1];
numstus--;
printf("删除成功!\n");
}
}
void count(student stud[])
{
int i,j;
for(i=0;i<numstus;i++)
{
stud[i].index=1;
for(j=0;j<numstus;j++)
if(stud[j].score>stud[i].score)
stud[i].index++;
}
}
void addrecord(student stud[])
{
int i=0,j,num;
char str[5];
if(numstus!=0)
{
printf("已有记录存在是否覆盖?(y/n)\n");
gets(str);
if(str[0]=='Y'||str[0]=='y')
i=0;
else i=numstus;
}
printf("请输入增加的学生信息条目数:");
scanf("%d",&num);
if(i==0)
numstus=num;
else numstus+=num;
if(numstus>lens)
{
lens+=50;
pointer=(student *)realloc(pointer,lens*LEN);
}
printf("请输入学生信息:\n");
for(;i<numstus;i++)
{
getchar();
printf("请输入学号:");
gets(pointer[i].number);
printf("请输入姓名:");
gets(pointer[i].name);
printf("请输入性别(男/女 1/0):");
gets(pointer[i].sex);
if(pointer[i].sex[0]=='0') strcpy(pointer[i].sex,"女");
else strcpy(pointer[i].sex,"男");
printf("请输入各科成绩:(按ABCDE的顺序):");
stud[i].score=0;
for(j=0;j<numsubs;j++)
{
scanf("%f",&stud[i].subject[j]); /*计算总分*/
stud[i].score+=stud[i].subject[j];
}
stud[i].average=stud[i].score/numsubs; /*计算平均分*/
}
count(stud); /*附名次*/
display(stud,0,numstus-1);
getchar();
}
int numstus;
int lens;
student *pointer;
void main()
{
int i=1;
char str[2];
lens=100;
pointer=(student *)malloc(lens*LEN); /*分配内存*/
numstus=0;
welcome(); /*欢迎界面*/
while(i>0)
{
i=menu_select(); /*控制菜单*/
switch(i)
{
case 1:addrecord(pointer);break; /*增加学生信息*/
case 2:findrecord(pointer);break; /*查询学生信息*/
case 3:amendrecord(pointer);break; /*修改学生信息*/
case 4:sort(pointer);break; /*学生信息排序*/
case 5:statistic(pointer);break; /*统计信息*/
case 6:openfile(pointer);break; /*打开文件*/
case 7:writetotext(pointer);break; /*保存文件*/
case 8:display(pointer,0,numstus-1);break; /*显示记录*/
case 0:
if(numstus!=0) printf("是否保存当前记录?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
writetotext(pointer);
i=-1;break; /*退出系统*/
default:printf("请输入数字0~8:\n");i=1; /*输入错误*/
}
}
printf("\t\t欢迎再次使用本系统。\n\n");
display1();
}
⑻ 学生成绩管理系统c语言编辑的毕业设计 〔20分〕
#include <stdio.h>
#include <stdlib.h>
#include<string.h>
#define MENU_NUM 7
#define N 3
typedef struct s1
{
char no[11]; /*学号由10个字符组成*/
char name[15]; /*学生姓名*/
float score[N]; /*各门课成绩*/
float sum; /*总分*/
float average; /*平均分*/
int order; /*名次*/
struct s1 *next; /*指向后继结点的指针*/
}STUDENT; /*定义结构体类型*/
STUDENT * head=NULL;
void InputData( STUDENT * ptr );
void PrintMenu( );
int Menu_Select( );
void Init( );
void create( );
void print( ) ;
void Delete( );
void append();
void computer();
main()
{
int key;
while(1) {
key=Menu_Select();
switch(key)
{
case 0: Init();
//初试化链表。也就是若链表不为空则释放链表中所有数据，将head置为空(NULL)
break;
case 1: create();
//创建链表，输入数据
break;
case 2: Delete();
//删除一个指定学号的记录数据
break;
case 3: print();
//打印链表中所有数据
break;
case 4: computer();
//计算链表中所有人的总分和平均分
break;
case 5: append();
//追加一个数据到链表的尾部
break;
case 6: Init();
//释放链表
exit(0);
}
};
}
void PrintMenu( )
{
int i;
char * menu[]={
"0. Init list",
"1. Enter list",
"2. Delete a record from list",
"3. Print list",
"4. Compute the score",
"5. Insert record to list",
"6. Quit"
};
printf("\n\n");
for (i=0;i<MENU_NUM;i++)
printf("%s\n",menu[i]);
printf("\nEnter your choice(0-6):");
}
int Menu_Select( )
{
int key;
PrintMenu( );
scanf("%d",&key);
return key;
}
void Init( ) //初始化单链表。也就是释放链表中的所有数据
{
STUDENT *p,*ptr;//定义两个临时指针变量p,ptr
p=head;ptr=head;//将两个临时变量指向头指针head ；
while(ptr!=NULL)
{
ptr=ptr->next;//ptr指向下一个结构数据
free(p);//释放p所指向的结构数据的内存
p=ptr;//将p指向ptr所指向的数据
}
head=NULL;//将head指向NULL
}
void create( ) //创建单链表
{
STUDENT *pt, *pth=NULL; //定义两个指针变量：pt指向即将申请新的数据内存，pth指向当前数据
while(1)
{
pt=(STUDENT *)malloc(sizeof(STUDENT));//让pt指向新申请的内存空间
InputData(pt);//输入数据，存放到pt所指向的结构数据。注意让pt的next指向NULL
if (strcmp(pt->no,"@")==0)
{
free(pt);//释放pt所指向的内存空间
break;//退出循环
}
else if (head==NULL)
{
pth=pt;
head=pt;//将头指针head和pth指向pt
}
else
{
pth->next=pt; //将pth的next指向pt;
pth=pt; //将pth指向pt;
}
};
}
void print( ) //打印单链表中所有数据
{ int i=0;
STUDENT *p;//第一个指针p
p=head;//将p指向head
printf("\n");
printf("******************************STUDENT******************************\n");
printf("|rec|no | name | sc1| sc2| sc3| sum | ave |order|\n");
printf("|---|----------|----------------|----|----|----|------|-----|-----|\n");
//打印表头
while (p!=NULL)
{
printf("|%3d|%10s|%-16s|%4.1f|%4.1f|%4.1f|%6.2f|%5.1f|%5d|\n",
++i,p->no,p->name,p->score[0],p->score[1],p->score[2],
p->sum,p->average,p->order); //打印p所指向的结构中的所有数据。注意打印数据间的分隔线
p=p->next;//将p指向p的下一个结构数据
}
printf("********************************END********************************\n");//打印表尾
}
void Delete( ) //删除一个记录
{
STUDENT *p,*pth;//定义两个指针p,pth
char no[11];//定义一个整数no(用来存储输入的学号)
printf("intput delete no\n");
scanf("%s",no);//用输入语句输入一个学号存储到no中
p=head;pth=head;//将p和pth都指向头指针
if (strcmp(p->no,no)==0) //也就是若头指针指向的数据需要删除
{
head=head->next;//将head指针指向head的下一个数据；
free(p);//释放p所指向的数据
}
else
{
p=p->next;//将p指向p的下一个数据
while ( p!=NULL)
{
if (strcmp(p->no,no)==0) //找到了要删除的数据
{
pth->next=p->next;//将pth的next指向p的next
free(p);//释放p
break;//退出循环
}
else
{
pth=pth->next;//将pth指向pth的next 或 将pth指向p
p=p->next;//将p指向p的next
}
}
}
}
void append()
{
STUDENT *p,*pth;//定义两个指针变量p,pth
pth=head;//将pth指向head
while ( pth->next!=NULL)
{
pth=pth->next;//ptr指向ptr的next
}
p=(STUDENT *)malloc(sizeof(STUDENT));//将p指向新申请的内存空间
InputData(p);p->next=NULL;//数据数据存储到p所指向的内存空间，注意将p的next置为NULL
pth->next=p;//将ptr的next指向p
}
void InputData( STUDENT *ptr )
{ int i;
printf("enter no:");
scanf("%s",ptr->no);
if (strcmp(ptr->no,"@")==0 ) return;
printf("enter name:");
scanf("%s",ptr->name);
for(i=0;i<3;i++)
{
printf("shuru chengji\n");
scanf("%f",&ptr->score[i]);
}
ptr->sum=0;
ptr->average=0;
ptr->order=0;
ptr->next=NULL;
}
void computer()
{
STUDENT *p;
p=head;
for(;p;p=p->next)
{
p->sum=p->score[0]+p->score[1]+p->score[2];
p->average=(p->score[0]+p->score[1]+p->score[2])/3;
}
}
⑼ 计算机专业的基于C语言的图书管理系统的设计与实现 论文开题报告
这个图书管理系统有详细要求吗？
可以发给我看看 我做