#include<iostream.h>
#include<conio.h>
#include<math.h>
#include<graphics.h>
int main(void)
{
 
  int gdriver = DETECT, gmode;
  float x,w1,w,a,f,fs;
  cout<<"\n\tEnter amplitude:";
  cin>>a;
  cout<<"\n\tEnter freq.:";
  cin>>f;
  cout<<"\n\tEnter sampling points:";
  cin>>fs;
  w=2*3.14*f;
 
  initgraph(&gdriver, &gmode, "c:\\tc\\bgi");
  line(0, 0,0,500);
  line(0,200,800,200);
 // getch();
 
  for(int n=0;n<640;n++)
  {
	w1=w*n;
	x=a*sin(w1/fs);
	x=x+200;
	putpixel(n,x,25);
  }
  getch();
		closegraph();
   return 0;
}