dxyy3.cpp

访问数据库,操作方法简单

// dxyy3.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "iostream.h"

int main()
{
	int i,j,t,n=0,num;
	int a[10];
	//从键盘为数组元素赋值
	for(i=0;i<10;i++)
	{
		cout<<"a["<<i<<"]=";
		cin >>a[i];
	}
	//对数组排序
	for(i=0;i<9;i++)
	{
		for(j=0;j<9-i;j++)
		{
			if(a[j] > a[j+1])
			{
				t = a[j];
				a[j] = a[j+1];
				a[j+1] = t;
			}
		}
	}
	cout<<"输入要查找的数据："<<"\n";
	cin >>num;
	cout<<"输出数组："<<"\n";
	for(i=0;i<10;i++)
	{
		cout<<a[i]<<"\t";
		if((i+1)%3 == 0)
		{
			cout<<"\n";
		}
	}
	cout<<"\n";
	int left = 0,right = 9,mid;
	while(left <= right)
	{
		mid = (left+right)/2;
		if(a[mid] == num)
		{
			cout<<"要查找的元素是："<<"\n";
			cout<<"a["<<mid<<"]="<<num<<"\n";
			n++;
		}
		if(a[mid] < num)
		{
			left = mid+1;
		}
		else
		{
			right = mid-1;
		}
	}
	if(n == 0)
	{
		cout<<"要查找的元素不存在！"<<"\n";
	}
}