迷茫了照书不对，删删加加

int sum(int x,int y)
{
int z;
z=x+y;
return z;
}
main()
{
int a,b,c;
scanf("%d,%d",&a,&b);
c=sum(a,b);
printf("sum=%d \n",c);
getch();
}

#include "stdio.h"
int sum(int x, int y)
{
    int z;
    z = x + y;
    return z;
}
void main()
{
    int a, b, c;
    scanf("%d,%d", &a, &b);
    c = sum(a, b);
    printf("sum=%d \n", c);
    getch();
}