A. 用c語言怎麼寫
#include<stdio.h>
struct date
{
int year;
int month;
int day;
};
int days(struct date day)
{
static int day_tab[2][13]=
{{0,31,28,31,30,31,30,31,31,30,31,30,31,}, /*平均每月的天數*/
{0,31,29,31,30,31,30,31,31,30,31,30,31,},
};
int i,lp;
lp=(day.year%4==0&&day.year%100!=0)||day.year%400==0;
/*判定year為閏年還是平年，lp=0為平年，非0為閏年*/
for(i=1;i<day.month;i++) /*計算本年中自1月1日起的天數*/
day.day+=day_tab[lp][i];
return day.day;
}
int main()
{
struct date today,term;
int yearday,year,day;
printf("請輸入日期：（年 月 日）:");
scanf("%d%d%d",&today.year,&today.month,&today.day); /*輸入日期*/
term.month=12; /*設置變數的初始值：月*/
term.day=31; /*設置變數的初始值：日*/
for(yearday=0,year=1990;year<today.year;year++)
{
term.year=year;
yearday+=days(term); /*計算從1990年至指定年的前一年共有多少天*/
}
yearday+=days(today); /*加上指定年中到指定日期的天數*/
day=yearday%5; /*求余數*/
if(day>0&&day<4) printf("打魚 "); /*列印結果*/
else printf("曬網 ");
}
B. C語言要寫在哪裡
如果是要考試的話。。。就用TC
2.0。。如果不是為了考試，就用Visual
C++3.0，後邊的這個功能多一點。。。
C. 用C語言寫。
#include<stdio.h>
intmain()
{
inta,b,h,f,k=1;
scanf("%d%d",&h,&f);
if(h<=0||f<=0)
printf("輸入錯誤!");
else
{
for(a=0;a<=f/2;a++)
for(b=0;b<=f/4;b++)
if(a+b==h&&a*2+b*4==f)
{
k=0;
printf("雞:%d只,兔%d只 ",a,b);
}
if(k)printf("無解");
}
return0;
}
D. 用C語言寫
自己去網上搜！！
E. c語言本身是開源的嗎，c語言是用什麼寫的謝謝大家了
C語言是一個由ISO組織中的ANSI制定的標准，任何個人或者組織都可以根據這個標准將其實現。現今，世界上有許多不同的C語言實現，比較著名的有：GCC、Watcom、MS C等，其中前兩者是開源的，後者是閉源的。下面粘貼幾個老外的回答（原回答鏈接）。
The C language is not a piece of software but a defined standard, so one wouldn't say that it's open-source, but rather that it's an open standard.
There are a gazillion different compilers for C however, and many of those are indeed open-source. The most notable example is GCC's C compiler, which is all under the GNU General Public License (GPL), an open-source license.
There are more options. Watcom is open-source, for instance. There is no shortage of open-source C compilers, but without a doubt the most widespread one, at least in the non-Windows world, is GCC.
For Windows, your best bet is probably Watcom or GCC by using Cygwin or MinGW.
C is a standard which specifies how C compilers should generate programs.
C itself doesn't have any source code, just like a musical note doesn't have any plastic.
Some C compilers, such as GCC, are open source.
C is just a language, and a standardised one at that, too. It pretty much is the compiler that "does all the work". Different compilers did have different dialects; before the the C99 ANSI standard, you had things like Borland C and other competing compilers, that implemented the C language in their own fantastic ways.
stdlib is just an agreed-upon collection of standard libraries that are required to be present in any ANSI C implementation.
關於C++開源與否：
與C語言類似，C++也是由ISO/ANSI制定的一個標准，所謂的「官方」並未給出確切的實現，任何組織與個人都可以根據標准自己開發一個C++編譯器出來。出名的C++編譯器有：GCC/G++、libc/libc++、clang（++）、 Visual studio和MS´ runtime等。也把老外的幾個回答貼出來（原回答鏈接）。
C++ itself is only a description what the language should be,
without a definite implementation.
Anyone can make his own implementations (compiler etc, runtime library, ...)
and call it C++ if it fits to the description.
http://www.open-std.org/jtc1/sc22/wg21/
And if a implementation is open source depends on the creator.
Examples of implementation (parts):
GCC/G++, libc/libc++, clang (++ too), Visual studio and MS´ runtime...
C++ is developed by an ISO standard committee. There's also a C++ foundation that runs a web site you might want to read.
C++ itself is a language, not a specific implementation, so there's no source code available for the standard/language itself.
Some C++ implementations are open source (e.g., Gnu and Clang).
1. C++ is a code standard defined by the International Organization of Standardization (ISO). There are many different implementations of the language, but they all tend to conform to C++11. Unlike Linux or Qt, C++ is just a standard, and to use any code written in the language you'll need a compiler. The major compilers (list from Wikipedia) are LLVM Clang, GCC, Microsoft Visual C++, and the Intel C++ Compiler.
2. C++ revisions are dealt with by ISO, and are influenced primarily by the maintainers of the above four implementations.
3. Clang and GCC are both open-source, I'm sure if you poke around you can find other conforming compilers but those are the two most used.
總之，跟Java、Python和PHP這樣所謂的開源語言不同，C語言與C++沒有官方提供的各自確切的實現代碼（庫），ISO/ANSI僅僅提供了C和C++的標准。
這些都是我從自個兒博客摘抄來的，也不見得有人看得到。
F. 怎樣用c語言寫
染色法。設置染色數組array
初始顏色為各元素各自顏色，即array[i] = i;
在讀入學生團體的時候進行「著色」。目的是把學生團體涉及的學生顏色染成同一種顏色。
在染色時發現別的團體的顏色，就把該兩種團體的顏色合並。
最後，查找目標編號的學生顏色，在數組中統計該顏色的所有學生即可。
#include <stdio.h>
void color (int * array, int n, int color1, int color2)
{
int i;
for (i = 0; i < n; i++)
if (array[i]==color1)
array[i]=color2;
}
void main()
{
int n, k;
n = 100;
int array [100];
// 初始化染色數組
int i, j, m;
for (i = 0; i < 100; i++)
array [i] = i;
scanf("%d", &k);
int kn;
for (i = 0; i < k; i++)
{
scanf ("%d",&kn);
for (j = 0; j < kn; j++)
{
scanf( "%d", &m);
color (array, n, array[m], n+i);
}
}
scanf ("%d", &j);
for (i = 0; i < 100; i++)
if (array[i]==array[j])
printf ("%d ", i);
printf ("\n");
}
G. C語言是由什麼語言編寫而成的
我想，你問的是 C語言編譯器 是用什麼語言寫的。
概括說，當今幾乎所有的實用的編譯器/解釋器都是用C語言編寫的，有一些語言比如Clojure,Jython等是基於JVM或者說是用Java實現的，IronPython等是基.NET實現的，但是Java和C#等本身也要依靠C/C++來實現，等於是間接調用了C。
世界上第一個C語言編譯器，是在B語言基礎上，用B語言與PDP匯編語言 編寫的。開發過程是先用匯編寫了一個最基本功能的子集C0，利用自編譯Self-Compile功能，或虛擬機CVM（C Language Virtual Machine）功能，增添新的東西，變C1, 按此法多次增添發展，滾雪球般用匯編把小雪球揉到一起，1生2，2生3，...成了C。C 再生萬物。
這里，該向C語言之父Dennis Ritchie（丹尼斯·里奇）致敬。
H. C語言是用什麼語言寫的
c語言是unix的「副產物」，當時湯姆遜用匯編和「B語言」開發了unix，但由於艱澀難懂，亦不便移植與推廣，丹尼斯里奇對「B語言」進行了提煉，猜測可能基於匯編，寫出了第一個「C編譯器」，並用C語言對unix進行了重寫，使得unix可以不依賴具體機器系統，可移植性大增，當然這也歸功於C語言的可移植特性。此後C語言由ANSI制定了ANSI
C標准，奠定了現在各種C與類C語言的基礎。
I. 用c語言寫
int main(void)
{
int n,i,a;
int num=1,num_max=0,main_num;
int S[n];
scanf("%d\n",&n);
for(i=0;i<n;i++){scanf("%d ",&a);S[i]=a;}
for(i=0;i<n;i++)
{
for(a=0;a<n;a++)if(S[i]==S[a])num++;
if(num>num_max){num_max=num;main_num=S[i];}
num=1;
}
return main_num;
}