#include "stdio.h"
void main ()
{
    int a,b,s;
    scanf("%d,%d",&a,&b);
    s=area(a,b);
    printf("area is %d\n",s);
}
int area(int x,int y)
{
    int s;
    s=x*y;
    return s;
}

出现了error C2065: 'area' : undeclared identifier
error C2373: 'area' : redefinition; different type modifiers咋回事?

int area(int x,int y)这不就是函数的神明?

弱弱问一句,这么做为啥?

多谢不吝赐教