// program to print all the squares from 1 to the entered number
#include <iostream>
using namespace std;

int main()
{
   int number;
   int counter;
   int square;

   cout << "Enter a positive number -- ";
   cin >> number;

   // using a while loop
   counter = 1;
   while (counter <= number) {
      square = counter * counter;
      cout << square << ' ';
      counter = counter + 1;
   }
   cout << endl;
   
   // using a do-while loop
   counter = 1;
   do {
      if (counter <= number) {
	 square = counter * counter;
	 cout << square << ' ';
	 counter = counter + 1;
      }
   } while (counter <= number);
   cout << endl;

   // using a for loop
   for(counter = 1; counter <= number; counter++) {
      square = counter * counter;
      cout << square << ' ';
   }
   cout << endl;

   return 0;
}