Sample C++ code for loops and conditional expressions

sample.cpp

// Example program
#include <iostream>
#include <string>

using namespace std;


int getAction()
{
    int action = 0;
    
    cout << "Please select an action \n";
    cout << "1 - Get sum of all numbers from 1-n \n";
    cout << "2 - Get sum of all even numbers from 1-n \n";
    cout << "3 - Get sum of all odd numbers from 1-n \n";
    cout << "4 - Get sum of all fibonacci numbers from 1-n \n";
    cout << "5 - Get sum of all numbers divisible by 3,4 and 5 from 1-n \n";
    cout << "Enter your choice : ";
    cin >> action;
    
    return action;
}

int getSumOfAllNumbers(int number)
{
    // your code to compute sum goes here...
    int result = 0;
    
    return result;
}

int getSumOfAllEvenNumbers(int number)
{
    // your code to compute sum goes here...
    int result = 0;
    
    return result;
}

int getSumOfAllOddNumbers(int number)
{
    // your code to compute sum goes here...
    int result = 0;
    
    return result;
}

int getSumOfAllFibonacciNumbers(int number)
{
    // your code to compute sum goes here...
    int result = 0;
    
    return result;
}

int getSumOfAllDivisibleNumbers(int number)
{
    // your code to compute sum goes here...
    int result = 0;
    
    return result;
}

int main()
{
    // deaclare the needed variables
    int number = 0;
    char response;
    bool repeat = true;
    int action = 0;
    int answer = 0;
    bool validAction;
      
    // repeat the process while repeat is TRUE
    while( repeat == true)
    {
        cout << "Please enter a number : ";
        cin >> number;
            
        // show menu and get action
        action = getAction();
        
        // set it initially to true
        validAction = true;
        switch ( action )
        {
            case 1:
                answer = getSumOfAllNumbers(number);
                break;
            case 2:
                answer = getSumOfAllEvenNumbers(number);
                break;
            case 3:
                answer = getSumOfAllOddNumbers(number);
                break;
            case 4:
                answer = getSumOfAllFibonacciNumbers(number);
                break;
            case 5:
                answer = getSumOfAllDivisibleNumbers(number);
                break;
            default:
                cout << "ERROR : Invalid Choice \n";     
                // invalid action, set it to false
                validAction = false;
        }
        
        // only display the answer for valid actions
        if (validAction == true)
        {
            cout << "The answer is : " << answer << "\n";
        }
            
        cout << "Repeat the process (Y/N) ? :";
        cin >> response;
        
        // test if user entered Y (for yes), if Y then set repeat = TRUE
        // otherwise, set repeat to FALSE
        if ( toupper(response) == 'Y' ) repeat = true;
        else repeat = false;
      }
      
}