程序代码：

#include "stdio.h"
int main(void)
{int a[15];

 int i,j,t,min,mid,max,p;

 printf("Please input the array:\n");
  for(i=0;i<15;i++)
   scanf("%d",&a[i]);
  printf("\n");
  for(i=1;i<15;i++)
   for(j=0;j<15-i;j++)
    if(a[j]<a[j+1]){t=a[j];a[j]=a[j+1];a[j+1]=t;}
  printf("The consecution is:\n");
  for(i=0;i<15;i++)
   printf("%5d",a[i]);
  printf("\n");
   /*以上将数组按倒序排序*/
  printf("Please input a number:");
   scanf("%d",&p);
  max=a[0];min=a[14];
   for(;min<a[0];)
   {mid=(max+min)/2;
       if(p==mid){printf("The number is in the array!");break;}
     else if(p>mid)min=mid+1;
     else max=mid-1;
   }
   /*折半查找*/
}//??