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

This program takes an arithmetic operator (+, -, *, /) and two operands from an user and performs the operation on those two operands depending upon the operator entered by user.

Example:

# include <iostream>

using namespace std;

int main(){
char op;
float num1, num2;

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

cout << "Enter two operands: ";
cin >> num1 >> num2;

switch(op)
{
case '+':
cout << num1+num2;
break;

case '-':
cout << num1-num2;
break;

case '*':
cout << num1*num2;
break;

case '/':
cout << num1/num2;
break;

default:
// If the 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

Source: program

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