求最大值，最小值及中间值

#include "stdio.h"
void main()
{
int x,y,z;
int max,middle,min;
scanf("%d %d %d",&x,&y,&z);
if(x>y)
max=x;
else
max=y;
if(max>z)
max=max;
else
max=z;
printf("max=%d\n",max);
if(x<y)
min=x;
else
min=y;
if(min<z)
min=min;
else
min=z;
printf("min=%d\n",min);
printf("middle=%d",x+y+z-max-min);
}