Calculator Program

0 Suresh Chand March 31, 2021

In this example, We will learn to make a simple calculator using c++ programming language. This calculator makes mathematics operations like addition, multiplication, and division. We will use a switch case for this example.

Calculator program using c plus
Calculator program

Let’s look an code

Calculator Program CODE:

In this program, First we will ask for two numbers and one operator. If user provide valid operator then using switch case we will perform operation.

#include <iostream>

using namespace std;


// Main program
int main()

{

    char oper;

    float a, b;

    //We will ask to user for operands
    cout<<"Enter two operands: ";

    cin>> a >> b;

    //We will ask to user to enter operator i.e. +, -, *, /
    cout<<"Enter operator: ";

    cin>> oper;

    switch (oper)

    {

        // If operator is '+'
        case '+':

            cout << a + b;

            break;

        // If operator is '-'
        case '-':

            cout << a - b;

            break;

        // If operator is '*'

        case '*':

            cout << a * b;

            break;

        // If operator is '/'

        case '/':

            cout << a / b;

            break;

        // If any other operator display error message

        default:

            cout << "Please enter valid operator!!!";

            break;

    }

    return 0;

}

The output of above program is

Enter two operands: 12
13
Enter operator: +
25


Enter two operands: 12
13
Enter operator: &
Please enter valid operator!!!
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