Write A Program To Generate Sine,Cosine,Square,Random And Exponential Signal And Perform Sampling

#include<stdio.h>
#include<dos.h>
#include<process.h>
#include<conio.h>
#include<math.h>
#include<graphics.h>
#include<stdlib.h>

void draw_axis()
{
	cleardevice();

	line(50,300,500,300);
	line(100,200,100,400);

	outtextxy(60,310,"(0,0)");
}
void main()
{
	int gdriver = DETECT, gmode, errorcode;
	int ch2,a,f,ch,t1,flag,Ts,b;
	float x,y,t,i,j,Tsf;

	initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

	do
	{
		cleardevice();
		printf("\n\n****Menu****\n\n1.Sine Wave\n2.Cosine Wave"
		"\n3.Expo Wave\n4.Random Signal\n5.Square Wave\n6.Exit"
		"\n\nEnter Your Choice : ");
		scanf("%d",&ch);

		switch(ch)
		{
			case 1:
				printf("\n\nEnter Amplitude : ");
				scanf("%d",&a);

				printf("\n\nEnter Frequency : ");
				scanf("%d",&f);

				do
				{

				draw_axis();

				for(t=0;t<400;t++)
				{
					y=(a)*sin(6.28*f*t);
					delay(1);
					putpixel(t+100,y+300,WHITE);
				}

				outtextxy(50,50,"Enter Ts : ");
				scanf("%d",&Ts);

				for(t=0;t<400;t+=Ts)
				{
					y=(a)*sin(6.28*f*t);
					delay(1);
					line(t+100,300,t+100,y+300);
				}

				outtextxy(50,60,"Do You Want To Change Ts(1/0) : ");
				scanf("%d",&ch2);
				}while(ch2==1);

				break;

			case 2:
				printf("\n\nEnter Amplitude : ");
				scanf("%d",&a);

				printf("\n\nEnter Frequency : ");
				scanf("%d",&f);

				do
				{

				draw_axis();

				for(t=0;t<400;t++)
				{
					y=(-a)*cos(6.28*f*t);
					delay(1);
					putpixel(t+100,y+300,WHITE);
				}

				outtextxy(50,50,"Enter Ts : ");
				scanf("%d",&Ts);

				for(t=0;t<400;t+=Ts)
				{
					y=(-a)*cos(6.28*f*t);
					delay(1);
					line(t+100,300,t+100,y+300);
				}

				outtextxy(50,60,"Do You Want To Change Ts(1/0) : ");
				scanf("%d",&ch2);

				}while(ch2==1);

				break;

			case 3:
				printf("\n\nEnter a : ");
				scanf("%d",&a);

				printf("\n\nEnter b : ");
				scanf("%d",&b);

				do
				{

				draw_axis();

				//a * e ^ ( b * t )
				for(t=0,x=0;t<10;t+=.01,x=x+.5)
					putpixel(t+100+x,a*exp(b*t)+300,WHITE);

				outtextxy(50,50,"Enter Ts : ");
				scanf("%f",&Tsf);

				for(t=0,x=0;t<10;t+=Tsf,x=x+(50*Tsf))
					line(t+100+x,300,t+100+x,a*exp(b*t)+300);

				outtextxy(50,60,"Do You Want To Change Ts(1/0) : ");
				scanf("%d",&ch2);
				}while(ch2==1);

				break;

			case 4:

				draw_axis();
				randomize();

				for(t=0,a=random(40);t<400;t=t+3,a=a+1)
				{
					f=random(25);
					if(a%2==0)
					{
						y=(a)*sin(6.28*f*t);
						putpixel(t+100,y+300,WHITE);
					}
					else
					{
						y=(a)*cos(3.14*f*t);
						putpixel(t+100,y+300,RED);
					}
					delay(10);
				}
				break;

			case 5:
				printf("\n\nEnter Amplitude : ");
				scanf("%d",&a);

				do
				{

				draw_axis();
				x=100;
				y=300;
				for(t1=0;t1<4;t1++)
				{
					line(x,y+a,x,y-a);
					delay(100);
					line(x,y-a,x+50,y-a);
					delay(100);
					x=x+50;

					line(x,y-a,x,y+a);
					delay(100);
					line(x,y+a,x+50,y+a);
					delay(100);
					x=x+50;
				}

				outtextxy(50,50,"Enter Ts : ");
				scanf("%d",&Ts);
				b=50/Ts;
				int cnt=0,flag=0;

				for(t1=Ts;t1<400;t1=t1+Ts)
				{
				 //   if(t1%50 !=0)
				    {
					if(flag==0)
					{
						line(t1+100,y,t1+100,y-a);
						cnt++;
						if(cnt==b)
						{
							flag=1;
							cnt=0;
							goto l1;
						}
					}

					if(flag==1)
					{
						line(t1+100,y,t1+100,y+a);
						cnt++;
						if(cnt==b)
						{
							flag=0;
							cnt= 0;
						}
					}
					l1:
				    }
				}

				outtextxy(50,60,"Do You Want To Change Ts(1/0) : ");
				scanf("%d",&ch2);
				}while(ch2==1);

				break;

			case 6:	exit(0);
		}
		outtextxy(50,450,"Press 1 To Continue...");
		scanf("%d",&flag);
	}while(flag==1);

	getch();
	closegraph();
}