C++/Language/Register
Use register variable
#include <iostream>
using namespace std;
void clrscr(int size=25);
int main()
{
register int i;
for( i = 0; i < 30; i++ )
cout << i << endl;
cin.get();
clrscr(); // clears 25 lines
for( i = 0; i < 30; i++ )
cout << i << endl;
cin.get();
clrscr(10); // clears 10 lines
return 0;
}
void clrscr(int size)
{
for(; size; size--)
cout << endl;
}