#include <stdio.h>
void main ()
{
int i,j,m,n;
i=8;j=10;m=++i;n=j++;
printf("%d,%d,%d,%d\\n",i,j,m,n);
}


--------------Configuration: aa_a - Win32 Debug--------------------
Linking...
aa_a1.obj : error LNK2005: _main already defined in aa_a.obj
aa_a2.obj : error LNK2005: _main already defined in aa_a.obj
Debug/aa_a.exe : fatal error LNK1169: one or more multiply defined symbols found
Error executing link.exe.

aa_a.exe - 3 error(s), 0 warning(s)
这个是什么错误？