binary

binary

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

#include "stdafx.h"
#include <iostream>
using namespace std;

int BinSearch(int data[], int numElements, int searchKey);

int main()
{
	bool exit = false;
	while (!exit)
	{
		int searchKey = 0;
		int data[] = {1, 4, 5, 6, 9, 14, 21, 23, 28, 31, 35, 42, 46, 50, 53, 57, 62, 63, 65, 74, 79, 89, 95};
		cout << "{1, 4, 5, 6, 9, 14, 21, 23, 28, 31, 35, 42, 46, 50, 53, 57, 62, 63, 65, 74, 79, 89, 95}" << endl;
		cout << "Enter search key (or 'x' to exit): ";
		cin >> searchKey;
		cout << searchKey << "is in position " << BinSearch(data[], 23, searchKey) << "." << endl;
	}
}

int BinSearch(int data[], int numElements, int searchKey)
{
	int a = 0;
	int b = numElements - 1;
	int m = (a + b) / 2;
	
	while (m != searchKey)
	{	
		m = (a + b) / 2;

		if(searchKey < data[m])
		{
			b = m;
		}
		else if (searchKey > data[m])
		{
			a = m;
		}
		else if (searchKey == data[m])
		{
			return m;
		}
	}
}