例7.3

#include<stdio.h>
int main()
{
int max(float x,float y);
float a,b;
int c;
scanf("%f,%f",&a,&b);
c=max(a,b);
printf("max is %d\n",c);
return 0;
}
int max(float x,float y)
{
float z;
z=x>y?x:y;
return (z);
}