Question

用指针方法编写一个程序，输入3个整数，将它们按由小到大的顺序输出

C程序

Answer 1

#include "stdio.h"
void main()
{
int a,b,c;
int *pa,*pb,*pc;
int max;
pa=&a;pb=&b;pc=&c;/*将三个数的地址赋给三个指针*/
printf ("input 3 numbers:");
scanf ("%d%d%d",pa,pb,pc);/*输入*/
if(*pa>*pb)
max=*pa;
else
max=*pb;
if(*pc>max)
max=*pc;/*输出*/
printf ("the max is %d",max);
}

Answer 2

#include <stdio.h>
void swap(int *pa,int *pb)
{
int temp;
temp = *pa;
*pa = *pb;
*pb = temp;
}
void main()
{
int a,b,c,temp;
scanf("%d%d%d",&a,&b,&c);
if(a>b)
swap(&a,&b);
if(b>c)
swap(&b,&c);
if(a>c)
swap(&a,&c);
printf("%d,%d,%d",a,b,c);
}