#include using namespace std; void repeat(char, int); char menu(); void addition(); double getNumber(); void subtraction(); void multiplication(); void division(); int main() { char choice; do { repeat('*', 25); choice = menu(); switch (choice) { case '+': addition(); break; case '-': subtraction(); break; case '*': multiplication(); break; case '/': division(); break; } } while (choice != 'E'); return 0; } void repeat(char character, int howMany) { for (int x = 1; x <= howMany; x++) { cout << character; } cout << endl; return; } char menu() { char choice; cout << "Menu: \n"; cout << "+ Addition\n"; cout << "- Subtraction\n"; cout << "* Multiplication\n"; cout << "/ Division\n"; cout << "E End\n"; repeat('*', 25); cout << "\nEnter choice: "; cin >> choice; while (choice != '+' && choice != '-' && choice != '*' && choice != '/' && choice != 'E') { cout << "Invalid choice, must be +, -, *, /, or E\n"; cout << "Enter choice: "; cin >> choice; } return choice; } void addition() { double number1, number2, result; number1 = getNumber(); number2 = getNumber(); result = number1 + number2; cout << "The result is " << result << endl; return; } void subtraction() { double number1, number2, result; number1 = getNumber(); number2 = getNumber(); result = number1 - number2; cout << "The result is " << result << endl; return; } double getNumber() { double number; cout << "Enter a number: "; cin >> number; return number; } void multiplication() { double number1, number2, result; number1 = getNumber(); number2 = getNumber(); result = number1 * number2; cout << "The result is " << result << endl; return; } void division() { double number1, number2, result; number1 = getNumber(); number2 = getNumber(); while (number2 == 0) { cout << "Can't divide by 0, try again\n"; number2 = getNumber(); } result = number1 / number2; cout << "The result is " << result << endl; return; }

***** Calculator *****

* Calculator *