#include <windows.h>
#include <iostream>

int main( )
{
    int min=100, max=2400, step=105, len=10; //freq-freq-freq-time
    int freq=min;

recur:
    while( freq<max )
    {
           Beep( freq, len );
           std::cout<<freq<<std::endl;
           freq+=step;
    }

    while( freq>min )
    {
           Beep( freq, len );
           std::cout<<freq<<std::endl;
           freq-=step;
    }
goto recur;

	return 0;
}