C++ Programming How to Make a Simple Calculator

This program will show you to how to make simple Calculator using if/else statement in C++ Language.

Program # 3 : Calculator using if/else statement

#include <iostream>

using namespace std;

int main()

{

    float a, b;

    char c;

    float R;

    cout << "Enter the First Number : \n";

    cin >> a;

    cout << "Enter the Second Number : \n";

    cin >> b;

    cout << "*****What to do?***** \n" << "+ For Addition \n" << "- For Subtraction \n" << "* For Multiplication \n" << "/ For Division \n " ;

    cin >> c;

    if(c=='+' )

        {

        R = a + b;

        cout << R;

        }

        else if(c=='-')

        {

            R = a - b;

            cout << R;

        }

        else if (c=='*')

        {

            R = a * b;

            cout << R;

        }

        else if(c=='/')

        {

            R = a / b ;

            cout << R;

        }

        else

            cout << "Invalid operator ";

    return 0;

}

Output Of the Program :

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