Question

using Microsoft Visual Studio C++ write a compute program that will allow the user to:

1.Get a Factorial (using a loop)

2. perform addition and subtraction

3.allow the user to quit the program

Answer 1

#include <iostream>
using namespace std;

int main() {
   int x;
   cout << "1. Factorial\n";
   cout << "2. Addition And Subtraction\n";
   cout << "3. Quit\n";
   cout << "Enter your choice: ";
   cin >> x;
      
       switch (x)
       {
       case 1:
       {
           int i, n, factorial = 1;

           cout << "Enter a positive integer: ";
           cin >> n;

           for (i = 1; i <= n; ++i) {
               factorial *= i; // factorial = factorial * i;
           }
           cout << "Factorial of " << n << " = " << factorial;
       }
           break;
      
       case 2:
       {
           char o;
           float num1, num2;

           cout << "Enter an operator (+, -): ";
           cin >> o;

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

           switch (o)
           {
           case '+':
               cout << num1 << " + " << num2 << " = " << num1 + num2;
               break;
           case '-':
               cout << num1 << " - " << num2 << " = " << num1 - num2;
               break;
           default:
               cout << "Error! operator is not correct";
               break;
           }
       }
           break;
       case 3:
       {
           exit;
       }
           break;
      
       default:
           cout<<"Choice other than 1, 2 and 3";
           break;
       }
       return 0;
}

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