Logical Operators Example

//logical_ex.cpp
//logical operators example
//Note:  there are three examples below -- study each example!


#include <iostream>

using namespace std;

int main()
{

	//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
	//logical and (&&)

	int x, y;		//variable declarations
	x = 7;			//initialize variables
	y = -5;

	cout << "\nx is 7 and y is less than 0?";
	
	// test for both conditions being true (&&)
	if (x==7 && y < 0)
	{
		cout << "\nBoth conditions have been met.\n\n ";
	}

		else
			cout << "\nSorry, both conditions are not met.\n\n\n";

	//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
	//logical or 

	int a, b;		//declare two more variables
	a = 3;			//initialize variables
	b = 78;

	cout << "\nNew Example (2): \n";
	cout << "\na is greater than 0 or b is less than 0\n";
	
	//test for conditions
	if (a >0 || b < 0) 
	{
		cout << "One of the two conditions has been met!\n\n\n";
	}
		
		else 
		{
			cout << "Neither of the two conditions has been met!\n\n\n";
		}

	//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
	//multiple tests
		
	int g, h,i,j;    //declare more variables
	
	g = 0;			//initialize variables
	h = 100; 
	i = -99;
	j = 35; 
	
	cout << "\nNew Example (3): \n";
	
	if ((g ==0 && h >50) && (i < 0 || j < 0))  //note extra parentheses!
	{
		cout << "Whew.  Something met the test\n";
		cout << "Can you believe it?\n";
	}
		else
			cout << "\nNothing fits!";

	return 0;

}	//end of main