程序代码：

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

 int a,b,c,t;

 if(a>b){t=a;a=b;b=t;}

 if(a>c){t=c;c=b;b=t;}

 if(b>c){t=b;b=c;c=t;}
}
main()
{

 int x,y,z;

 printf("input x,y,z");

 scanf("%d,%d,%d",&x,&y,&z);

 swap(x,y,z);

 printf("%d %d %d",x,y,z);

 getch();
}