在Ubuntu下，ANSI-C和GCC的初学者问题 /错误

Question

我只是在Ubuntu（9.04）下开始使用GCC编程ANSI C。我会得到以下错误消息：

错误消息：

main.c:6: error: expected identifier or ‘(’ before ‘/’ token
In file included from /usr/include/stdio.h:75,
                 from main.c:9:
/usr/include/libio.h:332: error: expected specifier-qualifier-list before ‘size_t’
/usr/include/libio.h:364: error: expected declaration specifiers or ‘...’ before ‘size_t’
/usr/include/libio.h:373: error: expected declaration specifiers or ‘...’ before ‘size_t’
/usr/include/libio.h:493: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘_IO_sgetn’
In file included from main.c:9:
/usr/include/stdio.h:314: error: expected declaration specifiers or ‘...’ before ‘size_t’
/usr/include/stdio.h:682: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fread’
/usr/include/stdio.h:688: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fwrite’
main.c:12: error: expected identifier or ‘(’ before ‘/’ token

我认为这是一个非常简单的问题，也许是在Ubuntu或GCC的配置中。我也是Linux下编程的新手。我谷歌寻求帮助，并经历了 教程 但找不到答案。谢谢！

代码：

/* cheat with the preprocessor to skip over missing lines to attempt
   to duplicate the circumstance of the original code */
#line 9
// #include <some_random_header.h>
#include <stdio.h>
#include <math.h>    
int main(int argc, char **argv)
    {
     printf("TestOutput\n");

     return (0);
    }

命令：

~/Documents/projects/Trials$ gcc -Wall -ansi  main.c 

Answer 1

您是否真的确定您显示的代码是您实际编制的代码？您会收到错误：

main.c:12: error: expected identifier or ‘(’ before ‘/’ token

但是该代码实际上没有12行。

Answer 2

我用“ //”来评论行，ANSI-C不喜欢。谢谢大家的意见！