#include <conio.h>
#include <stdio.h>
#include <math.h>
#include <dos.h>
#include <iostream.h>

class func
{
  private:
   int freq;

  public:
  func (int f)
  {
     freq=f;
  }
  void SinWave();
  void Init();
  void RecWave(int);
};

void func::Init()
{
      outp(0x303,0x80);
}
void func::SinWave()
  {
      unsigned char v1;
      float vout,mag;
      int a;
      float g;
      do
      {
	 for (a=0;a<360;a++)
	 {
	    vout=5.0+(5.0*sin((3.14*a)/180));
	    mag=vout*25.6;
	    g=mag;
	    v1=(char) mag;
	    delay(freq);
	    cout<<g<<"....\n";
	    //outp(0x300,v1);
	 }
      }
	while (!kbhit());
  }
void func::RecWave (int delayTime)
  {
	int a;
	int max=10;
	int min=0;
	int c;
	unsigned char v1;
	do
	{
	    for(a=0;a< (3*freq)  ;a++)
	    {
	       v1=(char) max;
	       c=max;
	       cout<<c<<".....\n";
	       delay(delayTime);
	    }
	    v1= (char) max/2;
	    c=max/2;
	    cout<<c<<".....\n";
	    for (a=(3*freq+1);a< (2*3*freq+1);a++)
	    {
	       v1=(char) min ;
	       c=min;
	       cout<<c<<".....\n";
	       delay(delayTime);
	    }
	}
	while (!kbhit());
  }

void main ()
{
	//outp(0x303,0x80);
	printf("\n Function Generator \n");
	printf("Please Enter Frequency ?");
	int f;
	scanf("\n%d",&f);
	func obj(f);
	obj.Init();
	printf("\nPress any key to Exit");
	obj.RecWave(200);

}