程序代码：

#include < stdio.h >
#include < stdlib.h >
void main( )
{
    int
    max( int x,int y );
    int a,    b,    c;
    scanf( "%d,%d",&a,&b );
    c = max( a,b );
    printf( "Max is %d\n",c );
    system ("pause");
    }
        int max (int x,int y)
    {int z;
    z = x > y ? x:y;
    return (z);
   
    }