#include<stdio.h>
int main()
{
    int a,b,c,z,max;
  scanf("%d%d%d",&a,&b,&c);
   if(a>b&&a>c)
   return max=a;
   if(b>a&&b>c)
   return max=b;
   if(c>a&&c>b)
   return max=c;
   z=max;
   printf("a,b,c的最大值为%d",z);
}
为什么这样不行?

think you

think you