C++ Program to Make a Simple Calculator to Add, Subtract, Multiply or Divide Using switch...case.

/* Source code to create a simple calculator for addition, subtraction, multiplication and division using switch...case statement in C++ programming. */

# include <iostream>

using namespace std;

int main()

{

    char o;

    float num1,num2;

    cout << "Enter operator either + or - or * or /: ";

    cin >> o;

    cout << "Enter two operands: ";

    cin >> num1 >> num2;

    switch(o) {

        case '+':

            cout << num1+num2;

            break;

        case '-':

            cout << num1-num2;

            break;

        case '*':

            cout << num1*num2;

            break;

        case '/':

            cout << num1/num2;

            break;

        default:

            /* If operator is other than +, -, * or /, error message is shown */

            cout << "Error! operator is not correct";

            break;

    }

    return 0;

}

Output

Enter operator either + or - or * or divide : -

Enter two operands:

3.4

8.4

3.4 - 8.4 = -5.0