① c语言中如何实现选项菜单的功能
#include<stdio.h>
#include<stdlib.h>
voidhello()
{
printf("helloworld ");
}
intmain()
{
intx;
while(1)
{
printf("-------------操作选项----------- ");
printf("1:返回菜单 ");
printf("2:退出程序 ");
printf("3:执行操作 ");
printf("-------------------------------- ");
printf("按数字键选择要执行的操作:");
scanf("%d",&x);
printf(" ");
//输入2跳出循环,退出程序
if(x==2)
break;
switch(x)
{
case1:break;//输入1,跳出switch语句,进入下一次循环
case3:hello();break;
default://数字输入错误,跳出siwtch语句,进入下一次循环
printf("输入的数字不正确 ");
break;
}
}
return0;
}
说明:有3个选项,1是用返回菜单,2是用于退出程序,3是用于执行相关的操作,这里只是一个示例,所以将要执行的操作,编写成了一个输出hello world的函数。
② C语言编写菜单
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
//值传递
voidfun1(chara)
{
a='b';
}
//地址传递
charfun2(char*a)
{
*a='a';
return*a;
}
//动态分配数组
voidfun3(char*&a)
{
a=(char*)malloc(sizeof(char));
}
charcaidan()
{
charchoose[5];
printf(" *************************************** ");
printf("┌──────┐ ");
printf("│菜单│ ");
printf("__________________________________ ");
printf("│1,按值传递| ");
printf("│2,按地址传递| ");
printf("│3,动态数组演示| ");
printf("│4,退出| ");
printf("└────────────────┙ ");
printf("************************************** ");
do
{
printf("请输入您的选择(1-4):");
scanf("%s",choose);
}while(strcmp(choose,"1")&&strcmp(choose,"2")&&strcmp(choose,"3")&&strcmp(choose,"4"));
//返回选择的菜单,注意如果输入太长这里会异常,因为choose[5],只申请了5个字节。
returnchoose[0];
}
voidmain()
{
//执行菜单的选择
while(1)
{
switch(caidan())
{
case'1':
{
chara='a';
fun1(a);
//按值传递内容不变
break;
}
case'2':
{
charb='b';
chara=fun2(&b);
//按地址传递内容会变
break;
}
case'3':
{
char*p=NULL;
fun3(p);
//动态数组分配成功
break;
}
case'4':exit(0);
}
}
}
③ 怎么用C语言编写菜单
#include "stdio.h"
#include "stdlib.h"
#include "dos.h"
#include "windows.h"
char choice1;
void main()
{
void menue1();
printf("欢迎进入Ben的作业查询系统!");
menue1();
}
void menue1()
{
void choicemenue1();
printf("\n请按照以下列表选择您想要查看的章节:");
printf("\n编号\t章节\n 1\t第一章\n 2\t第二章\n");
printf("请输入编号进行选择:");
choicemenue1();
}
void choicemenue1()
{
choice1=getch();
switch(choice1)
{
void menuechapter1();
void menuechapter2();
void menue1();
case '1':menuechapter1();break;
case '2':menuechapter2();break;
default:printf("\n输入错误!请重新选择!\n"),menue1();
}}
void menuechapter1()
{
char choiceex;
printf("\n您选择的是第%c章",choice1);
printf("\n现在请选择本章节的题目。");
printf("\n请按照以下列表选择题目:");
printf("\n编号\t题目编号\n1\t第1题\n2\t第2题\n");
printf("请选择:");
switch(choiceex=getch())
{
void c1_1();
void c1_2();
case '1':c1_1();break;
case '2':c1_2();break;
default:
printf("\n你个白痴!这也能选错!不让你重选了!");
printf("\n按任意键以退出!");
getch();
exit(0);
}
}
void menuechapter2()
{
char choiceex;
printf("\n您选择的是第%c章",choice1);
printf("\n现在请选择本章节的题目。");
printf("\n请按照以下列表选择题目:");
printf("\n编号\t题目编号\n1\t第1题\n2\t第2题\n");
printf("\n请选择:");
switch(choiceex=getch())
{
void c2_1();
void c2_2();
case '1':c2_1();break;
case '2':c2_2();break;
default:
printf("\n你个白痴!这也能选错!不让你重选了!");
printf("\n按任意键以退出!");
getch();
exit(0);
}
}
void c1_1()
{
char howtorun;
printf("现在请选择考察方式:");
printf("\n编号\t考察方式\n 1\t运行程序\n 2\t查看源代码\n 3\t返回主菜单\n 4\t退出程序\n");
printf("请选择:");
switch(howtorun=getch())
{
void runc1_1();
void menue1();
case '1':runc1_1();break;
case '2':printf("\n"),system("type \\caidan\\chapter1\\c1_1.c"),printf("\n"),getch();break;
case '3':menue1();break;
case '4':exit(0);break;
default:
printf("程序即将结束!哈哈哈……");
printf("按任意键以结束程序!");
getch();
exit(0);
}}
void c1_2()
{
printf("c1_2 is OK!");
}void c2_1()
{
printf("c2_1 is OK!");
}void c2_2()
{
printf("c2_2 is OK!");
}
void runc1_1()
{
int a,b,max;
printf("\nPlease input two integer numbers:");
printf("a=?,b=?\n");
scanf("%d,%d",&a,&b);
max=a>b?a:b;
printf("The max number is %d",max);
}
大概就是这样做的。。
④ 怎样用C语言编写菜单
对于窗口组件菜单,需要根据不同平台,通过图形编程接口,进行菜单的编制。
例程:
#include<stdio.h>
#include<graphics.h>
#include<conio.h>
voidmain()
{
charstr;
inti,k,choice=1;
intgd=DETECT,gm;
initgraph(&gd,&gm,"");
setbkcolor(2);
settextstyle(3,0,3);
outtextxy(140,120,"A.TheMockClock.");
outtextxy(140,150,"B.TheDigitalClock.");
outtextxy(140,180,"C.Exit.");
setlinestyle(0,0,3);
rectangle(170,115,370,145);
/*按上下键选择所需选项*/
for(i=1;i<=100;i++)
{
str=getch();
if(str==72)
{
--choice;
if(choice==0)choice=3;
}
if(str==80)
{
++choice;
if(choice==4)choice=1;
}
if(str==13)break;/*按回车键确认*/
/*画图做菜单*/
cleardevice();
switch(choice)
{case1:setlinestyle(0,0,3);
rectangle(170,115,400,145);
settextstyle(3,0,3);
outtextxy(140,120,"A.TheMockClock.");
settextstyle(3,0,3);
outtextxy(140,150,"B.TheDigitalClock.");
outtextxy(140,180,"C.Exit.");
break;
case2:setlinestyle(0,0,3);
rectangle(170,145,400,175);
settextstyle(3,0,3);
outtextxy(140,120,"A.TheMockClock.");
settextstyle(3,0,3);
outtextxy(140,150,"B.TheDigitalClock.");
settextstyle(3,0,3);
outtextxy(140,180,"C.Exit.");
break;
case3:settextstyle(3,0,3);
outtextxy(140,120,"A.TheMockClock.");
outtextxy(140,150,"B.TheDigitalClock.");
settextstyle(3,0,3);
outtextxy(140,180,"C.Exit.");
setlinestyle(0,0,3);
rectangle(170,175,400,205);
break;
}
}
if(i>=100)exit(0);/*如果按键超过100次退出*/
switch(choice)/*这里引用函数,实现所要的功能*/
{
case1:cleardevice();
setbkcolor(4);
settextstyle(3,0,4);
outtextxy(160,120,"No.1havenotbuilt.");break;
case2:cleardevice();
setbkcolor(4);
settextstyle(3,0,4);
outtextxy(160,150,"No.2havenotbuilt.");
break;
case3:exit(0);
}
getch();
closegraph();
}对于命令行菜单,直接通过不断刷新输出来模拟菜单行为。
例程:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
intn,t,k;
intm;
chars1[20],s2[20],c;
char**l;
char*num[]={"one","two","three","four","five","six","seven","eight","nine","ten"};
voidmenu()
{
printf(" ******************************************************* ");
printf(" **1.查找字符串S1中S2出现的次数** ");
printf(" **2.统计字符串中大小写字母,数字出现的次数** ");
printf(" **3.将数字翻译成英语** ");
printf(" **4.结束** ");
printf(" ******************************************************* ");
printf(" 您的输入:");
fflush(stdin);
scanf("%d",&n);
}
voidcheck()
{
chara[20],b[20];
intj=0,k,m,l=0;
intt=0,n=0;
printf("请输入主字符串: ");
scanf("%s",a);
k=strlen(a);
printf("请输入子字符串: ");
scanf("%s",b);
m=strlen(b);
for(n=0;n<k;n++)
if(a[n]==b[0])
{
j++;/*记录相同的字符数*/
do
{
if(a[++n]==b[++t])
{
j++;
if(j==m)
{
l++;/*子字符串相同数*/
j=0;/*判断后相同字符数归零*/
t=-1;/*判断中if中++t;t将会归零*/
}
}
else
{
j=0;
t=0;
break;/*如果不同跳出while循环让for使n+1继续判断*/
}
}while(a[n]!='