#include <iostream>//needs these three lines
#include <stdlib.h>//needs these three lines
using namespace std;//needs these three lines
 
int main(int argc, char *argv[])
{
  cout << "A simple Demonstartion of system(\"cls\");" << endl;
  system("PAUSE");	
  system("cls");//clears the screen
  cout << "The first two lines are gone" << endl;
  system("PAUSE");	
  return 0;
}