Example 1 : Generates a fahr-celcius conversion table

#include <iostream>
using namespace std;

int main() {
  int low, high, skip;
  float cel, fahr;

  cout << "Input lower limit, upper limit and skip value \n";
  cin >> low >> high >> skip;
  cel = low;

  do {
    fahr = 32 + (9*cel)/5;
    cout << cel << "   " << fahr <<"\n";
    cel = cel + skip;
  } while (cel < high +1);

  return 0;
}


Example 2 : Generates primes less than 100

#include <iostream>
using namespace std;

int main() {
  int a,b;

  a=2;
  while(a<=100) {
    b=2;
    while(b<=a) {
      if ((a%b)==0) {
	break;
      } else {
	b=b+1;
      }
    }

    if (b==a) 
      cout << a << "\n";
     
    a=a+1;
  }

  return 0;
}