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#include <iostream> using namespace std; // Function to perform addition double add(double a, double b) { return a + b; } // Function to perform subtraction double subtract(double a, double b) { return a - b; } // Function to perform multiplication double multiply(double a, double b) { return a * b; } // Function to perform division double divide(double a, double b) { if (b != 0) { return a / b; } else { cout << "Error: Division by zero is not allowed." << endl; return 0; // Return 0 to indicate error } } int main() { double num1, num2; char op; cout << "Enter first number: "; cin >> num1; cout << "Enter an operator (+, -, *, /): "; cin >> op; cout << "Enter second number: "; cin >> num2; switch (op) { case '+': cout << "Result: " << add(num1, num2) << endl; break; case '-': cout << "Result: " << subtract(num1, num2) << endl; break; case '*': cout << "Result: " << multiply(num1, num2) << endl; break; case '/': cout << "Result: " << divide(num1, num2) << endl; break; default: cout << "Error: Invalid operator" << endl; break; } return 0; } |
Explanation
- Arithmetic Functions:
add(double a, double b): Returns the sum ofaandb.subtract(double a, double b): Returns the difference betweenaandb.multiply(double a, double b): Returns the product ofaandb.divide(double a, double b): Returns the quotient ofadivided byb. It checks ifbis not zero to prevent division by zero and prints an error message ifbis zero.
- Main Function:
- Prompts the user to enter two numbers and an operator.
- Uses a
switchstatement to determine which arithmetic operation to perform based on the entered operator. - Calls the appropriate function and prints the result.