ubuntu环境下
1、c61501.c文件内容
#include <stdio.h>
int main()
{
int i,sum=0;
for(i=1;i<=100;i++){
sum+=i;
}
printf("1+2+3+……+100=%d\n",sum);
return 0;
}
2、编译
gcc c61501.c -o sum
3、效果
预备条件：
pateo@pateo-B86N53X:~$ gcc --version gcc (Ubuntu 4.3.5-3ubuntu1) 4.3.5 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. pateo@pateo-B86N53X:~$ g++ --version g++ (Ubuntu 4.3.5-3ubuntu1) 4.3.5 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
简单的说明,针对c61501.c文件，的main函数有返回值，其在java里面的main函数是固定的写法，没有返回值，但是c可以有可以没有，这个是为什么呢，我请教了下同事，主要原因是为了便于查这个函数执行的状态，可以通过echo $?来查看执行状态
pateo@pateo-B86N53X:~/work/study$ gcc c61501.c -o sum pateo@pateo-B86N53X:~/work/study$ ./sum 1+2+3+……+100=5050 pateo@pateo-B86N53X:~/work/study$ echo $? 0
头文件目录
pateo@pateo-B86N53X:~$ ls /usr/include/st stab.h stdint.h stdio_ext.h stdio.h stdlib.h string.h strings.h stropts.h pateo@pateo-B86N53X:~$ cd /usr/include/ pateo@pateo-B86N53X:/usr/include$ cat stdio.h