Added DDA for circle, line and triangle

DDA-circle.cpp

@@ -0,0 +1,50 @@
+#include <iostream>
+#include <graphics.h>
+using namespace std;
+
+int main() {
+	
+	// Taking input for X, Y coordinate and radius of the circle
+	int cordx, cordy, rad;
+	cout<<"Enter X coordinate for the circle:\t";
+	cin>>cordx;
+	cout<<"Enter Y coordinate for the circle:\t";
+	cin>>cordy;
+	cout<<"Enter radius for the circle:\t";
+	cin>>rad;
+	
+	// Logic for octent
+	int gd=DETECT,gm;
+	initgraph(&gd, &gm, NULL);
+
+	int x,y,p;
+	x=0;
+	y=rad;
+	
+	p=3-(2*rad);
+	
+	do {
+		putpixel(cordx+x, cordy-y, WHITE);
+		putpixel(cordx-x, cordy-y, GREEN);
+		putpixel(cordx+x, cordy+y, YELLOW);
+		putpixel(cordx-x, cordy+y, RED);
+		putpixel(cordx+y, cordy+x, WHITE);
+		putpixel(cordx+y, cordy-x, GREEN);
+		putpixel(cordx-y, cordy+x, YELLOW);
+		putpixel(cordx-y, cordy-x, RED);
+			if (p<0) {
+				p=p+(4*x)+6;
+			}
+			else {
+				p=p+(4*(x-y))+10;
+				y=y-1;
+			}
+	x=x+1;	
+	} while(x<y);
+	
+	outtext("Designed and Engineered by KSHITIJ");
+	
+	delay(50000);
+	closegraph();
+	return 0;
+}

DDA-line.cpp

@@ -0,0 +1,47 @@
+#include<iostream>
+#include<graphics.h>
+using namespace std;
+
+int main()
+{
+float x1,x2,y1,y2,dx,dy,xin,yin,x,y,len;
+     cout << "Enter the value of x1:\t";
+     cin >> x1;
+     
+     cout << "Enter the value of x2:\t";
+     cin >> x2;
+     
+     cout <<"Enter the value of y1:\t";
+     cin >> y1;
+     
+     cout << "Enter the value of y2:\t";
+     cin >> y2;
+     
+ int gd=DETECT,gm;
+ initgraph(&gd,&gm,NULL);
+     
+     dx=x2-x1;
+     dy=y2-y1;
+     if (abs(dx)>=abs(dy))
+         len=abs(dx);
+     else
+         len=abs(dy);
+     
+     xin=dx/len;
+     yin=dy/len;
+     
+     x = x1+0.5;
+     y = y1+0.5;
+     int i = 0;
+     while(i<=len)
+         {
+            if(i%2==0)
+          putpixel(x,y,GREEN);
+             x = x+xin;
+             y = y+yin;
+          i++;
+         }           
+delay(50000);
+closegraph();
+return (0);
+}         

DDA-triangle.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+#include <graphics.h>
+using namespace std;
+
+class triangle_maker {
+	
+	public:
+	
+	int gd=DETECT, gm;
+	float x1, y1, x2, y2, x, y;
+	float len, dx, dy, xin, yin;
+	
+	// Function to make edges of triangle
+	void edge(float x1, float y1, float x2, float y2){
+	
+	initgraph(&gd, &gm, NULL);
+	
+		dx=x2-x1;
+		dy=y2-y1;
+		
+		if (abs(dx)>=abs(dy)) {
+			len=abs(dx);
+		}
+		else {
+			len=abs(dy);
+		}
+	
+		xin=dx/len;
+		yin=dy/len;
+		
+		x=x1;
+		y=y1;
+		
+		int i=0;
+		while (i<=len) {
+			putpixel(round(x),round(y),WHITE);
+			x=x+xin;
+			y=y+yin;
+		i++;
+		}
+	}
+};
+
+int main(){	
+
+	float X1,X2,X3,Y1,Y2,Y3;
+	triangle_maker obj_triangle;
+	
+	cout<<"Enter X coordinate for first edge:\t";
+	cin>>X1;
+	cout<<"Enter Y coordinate for first edge:\t";
+	cin>>Y1;
+	cout<<"Enter X coordinate for second edge:\t";
+	cin>>X2;
+	cout<<"Enter Y coordinate for second edge:\t";
+	cin>>Y2;
+	cout<<"Enter X coordinate for third edge:\t";
+	cin>>X3;
+	cout<<"Enter Y coordinate for third edge:\t";
+	cin>>Y3;
+
+	obj_triangle.edge(X1,Y1,X2,Y2);
+	obj_triangle.edge(X2,Y2,X3,Y3);
+	obj_triangle.edge(X3,Y3,X1,Y1);
+	delay(50000);
+	closegraph();
+	return 0;
+}