#include<stdio.h>
#define N 10
main()
{
      int a[N];
      int mid,low=1,high=N,x,index=-1,found=0;

      int b[10],i,j,temp,n=0,m=0;
      printf("Please input ten numbers:\n");
      for(i=1;i<=10;i++)
      scanf("%d",&b[i]);
      for(j=1;j<=9;j++)
        for(i=1;i<=10-j;i++)
        {m++;
        if(b[i]>b[i+1])
        {
                       temp=b[i];
                       b[i]=b[i+1];
                       b[i+1]=temp;
        n++;
        }
        }
        printf("Output ten numbers:\n");
        for(i=1;i<=10;i++)
        printf("%6d",b[i]);
        printf("\nHave %d exchanging\n",n);
        printf("Have %d compare\n",m);

      printf("Input search date\n");
      scanf("%d",&x);
      mid=(low+high)/2;
      while(low<=high&&found!=1)
      {
                                if(x==a[mid])
                                {
                                             found=1;
                                             index=mid;
                                }
                                else if(x<a[mid])
                                high=mid-1;
                                else
                                low=mid+1;
                                mid=(low+high)/2;
      }
      if(found)
      printf("%d is on %d \n",x,index);
      else
      printf("No found");
system("pause");
}



为什么输入的数字（不论是数组里面有没有的数字）都说不载数组内？是数组排列部分的%6d的问题？%6d改成%d\t也找不到数字，为什么？哪错了？

数组b的下表从0开始，你这个数组溢出了；

你最好加点注释，我理不清你的本意是什么

先任意输入是个数字，之后对十个数字进行排序，从大到小，之后任意输入一个数字检查该数字是否为 数列中的数字

老兄我是服了你哦，你要看看你把数据存储在哪个数组？你定义两个数组但是你查找的数组写错了，你应该将while循环里面的数组换为b[N]数组，这样就OK

[code] while(low<=high&&found!=1)
      {
             mid=(low+high)/2;                
          if(x==b[mid])
               {
                    found=1;
                    index=mid;
                    break;
               }
            else 
                if(x<b[mid])
                {
                    high=mid-1;
                    printf("%d",a[high]);
                }

                else
                 low=mid+1;
            mid=(low+high)/2;
      }

[/code]

好吧，谢谢你了，我新手，，有时候就把自己弄晕了，3Q

被你带沟里去了，输入数组是b处理的数组是a.哎，惭愧

#include<stdio.h>
#define N 10
void main(void)
{
      int a[N];
      int mid;
      int low=0;
      int high=9;
      int x;
      int index;
      int found=0;

      int b[10];
      int i;
      int j;
      int temp;
      int n;
      int m=0;

      printf("Please input ten numbers:\n");
      for(i=0;i<10;i++)
      {
            scanf("%d",&b[i]);
      }
          for(j=0;j<10;j++)
          {
              for(i=0;i<10-j;i++)
              {
      
                {
                    m++;
                    if(b[i]<b[i+1])
                    {
                         temp=b[i];
                         b[i]=b[i+1];
                         b[i+1]=temp;
                         n++;
                    }
                }
              }
          }
        printf("Output ten numbers:\n");
        for(i=0;i<10;i++)
        {
            printf("%6d",b[i]);
        }
        
        printf("\nHave %d exchanging\n",n);
        printf("Have %d compare\n",m);

      printf("Input search date\n");
      scanf("%d",&x);
      printf("input x=%d\n",x);
      mid=(low+high)/2;
      while((low<=high)&&(found!=1))
      {

           if(x==b[mid])
              {
                  found=1;
                  index=mid;
              }
           else if(x>b[mid])
           {
              high=mid-1;
                 mid=(low+high)/2;
           }
           else
           {
              low=mid+1;
                 mid=(low+high)/2;
           }
         
         
      }
      if(found)
        printf("%d is on %d \n",x,index);
      else
        printf("No found");
    //system("pause");
      //return 0;
}