An example of do while

dowhile.cpp

#include <cstdlib>
#include <iostream>

using namespace std;
// standard c++
int main(int argc, char *argv[])
{
    // even if (choice = 'N'), do will run once
    char choice = 'Y';
    
    do {
       int a = 0,
           b = 0,
           c = 0;
           
           cout << "Enter a and b" << endl;
           cin >> a >> b;
           c = a + b;
           cout << "a + b = " << c << endl;
           
           cout << "Do you want to continue (Y/N)?" << endl;
           cin >> choice; 
           
    } while(choice == 'Y');
    
    system("PAUSE");
    return EXIT_SUCCESS;
}