请各位大神帮我看看哪里错了

#include<stdio.h>
int main()
{
    int max(int x,int y);
    int a,b,c;
    scanf("%d,%d,&a,&b);
    c=max(a,b);
    printf("max=%d\n",c);
        return 0;
}
int max(int x,int y)
{
    int z;
    if(x>y)z=x;
    else z=y;
    return(z);
}
C:\Users\20305\Desktop\new.cpp(6) : error C2001: newline in constant
C:\Users\20305\Desktop\new.cpp(7) : error C2146: syntax error : missing ')' before identifier 'c'
执行 cl.exe 时出错.

new.obj - 1 error(s), 0 warning(s)