#include<stdio.h>
int max(int x, int y)
{
int z;

z=x>y?x:y;
return z;

}
int main()
{
int a,b,c;
printf("输入两个数字：\n");
scanf("%d,%d",&a,&b);
c=max(a,b);
printf("max is %d\n",c);
}