#include<stdio.h>
int cude(int);
void main (void)
{
    printf("cube(3) =%d\n",cube(3));
    printf("cube(5) =%d\n",cube(5));
    printf("cube(8) =%d\n",cube(8));
}
int cube (int x){return x*x*x;}

报错：
--------------------Configuration: Func1 - Win32 Debug--------------------
Linking...
Func.obj : error LNK2005: _main already defined in Func1.obj
Func.obj : error LNK2005: _cube already defined in Func1.obj
Func1.obj : error LNK2001: unresolved external symbol _prinyf
Debug/Func1.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.

Func1.exe - 1 error(s), 0 warning(s)

#include<stdio.h>
int cube(int x);
void main (void)
{
    printf("cube(3) =%d\n",cube(3));
    printf("cube(5) =%d\n",cube(5));
    printf("cube(8) =%d\n",cube(8));
}
int cube (int x){return x*x*x;}

你的编译器有问题吧，我的没有事情啊？