Control statement in C++

	// Tutorial_ControlStatement.cpp : Defines the entry point for the console application.
	//
	#include "stdafx.h"
	#include <iostream>
	using namespace std;
	int main()
	{
	system("TITLE Calculator");
	system("COLOR 2");
	char cChar;
	double dfirstnumber;
	double dsecondnumber;
	char cDoagain;
	do
	{
	system("CLS");
	cout<<"Please insert first number"<<endl;
	cin>>dfirstnumber;
	cout<<"Inser the operation you want"<<"+,-,*,/"<<endl;
	cin>>cChar;
	cout<<"Please insert second number"<<endl;
	cin>>dsecondnumber;
	switch(cChar)
	{
	case '+':
	cout<<"The answer is "<< dfirstnumber <<"+"<< dsecondnumber << "=" << (dfirstnumber + dsecondnumber)<<endl;
	break;
	case '-':
	cout<<"The answer is "<< dfirstnumber <<"-"<< dsecondnumber << "=" << (dfirstnumber - dsecondnumber)<<endl;
	break;
	case '*':
	cout<<"The answer is "<< dfirstnumber <<"*"<< dsecondnumber << "=" << (dfirstnumber * dsecondnumber)<<endl;
	break;
	case 'x':
	cout<<"The answer is "<< dfirstnumber <<"*"<< dsecondnumber << "=" << (dfirstnumber * dsecondnumber)<<endl;
	break;
	case 'X':
	cout<<"The answer is "<< dfirstnumber <<"*"<< dsecondnumber << "=" << (dfirstnumber * dsecondnumber)<<endl;
	break;
	case '/':
	if (dsecondnumber==0)
	cout<<"Error! Can not devide by zero!"<<endl;
	else
	cout<<"The answer is "<< dfirstnumber <<"*"<< dsecondnumber << "=" << (dfirstnumber / dsecondnumber)<<endl;
	break;
	default:
	cout<<"please insert valid operators(+,-,*,/)"<<endl;
	}
	cout<<"Would you like to caculate again? y or n"<<endl;
	cin>>cDoagain;
	}while(cDoagain =='y'|| cDoagain=='Y');
	return 0;
	}

view raw gistfile1.cpp hosted with ❤ by GitHub

Demo of control statements: switch, do-while, if-else