编辑代码

#include <stdio.h>
void main()
{
	int a[10],num,low,high,mid,i,flag=0;
	printf("input the array:");
	for(i=0;i<=6;i++)
	{
		scanf("%d",&a[i]);
	}
	printf("input finding number:");
	scanf("%d",&num);
	low=0;
	high=9;
	while(low<=high)
	{
		mid=(low+high)/2;
		printf("low=%d,mid=%d,high=%d\n",low,mid,high);
		if(a[mid]>num)
		{
			high=mid-1;
		}
		if(a[mid]<num)
		{
			low=mid+1;
		}
		if(a[mid]==num)
		{
			flag=1;
			break;
		}
	}
	if(flag)
	{
		printf("found!\n");
	}
	else
	{
		printf("not found!\n");
	}
}