#include<stdio.h>
void main()
{
    float a,b,c,t;
    scanf("%f,%f,%f",&a,&b,&c);
    if(a>b)
    {
        t=a;
        a=b;
        b=t;
    }
    if(a>c)
    {
        t=a;
        a=c;
        b=t;
    }
    if(b>c)
    {
        t=b;
        b=c;
        c=t;
    }
    printf("%5.2f,%5.2f,%5.2f\n",a,b,c);
}
这个程序为什么运行不出来？错误提示为：
Linking...
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/v.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.

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