output the number by order.txt

求面积

#include<stdio.h>
void main()
 {void swap(int *p1,int *p2);
  int n1,n2,n3;
  int *p1,*p2,*p3;
  printf("input three integer n1,n2,n3:");
  scanf("%d,%d,%d",&n1,&n2,&n3);
  p1=&n1;
  p2=&n2;
  p3=&n3;
  if(n1>n2) swap(p1,p2);
  if(n1>n3) swap(p1,p3);
  if(n2>n3) swap(p2,p3);
  printf("Now,the order is:$%
}
 void swap(int *p1,int *p2)
  {int p;
    p=*p1;  *p1=*p2;
}