Merge pull request #6 from Sharmistha18/master

4

Author: SayanBan

flood1.c

@@ -0,0 +1,46 @@
+#include<stdio.h>
+#include<conio.h>
+#include<graphics.h>
+void breline(int,int,int,int);
+int main()
+{
+	int gd=DETECT,gm;
+	int x1,y1,xn,yn;
+	
+	printf("enter the starting co-ordinates:");
+	scanf("%d%d",&x1,&y1);
+	printf("enter the end co-ordinates:");
+	scanf("%d%d",&xn,&yn);
+	initgraph(&gd,&gm,"");
+	breline(x1,y1,xn,yn);
+	
+	getch();
+	return 0;
+
+}
+
+void breline(int x1,int y1,int xn,int yn)
+{
+	int dx,dy,s,t,p;
+	dx=xn-x1;
+	dy=yn-y1;
+	p=2*dy-dx;
+	s=2*dy;
+	t=2*(dy-dx);
+	putpixel(x1,y1,RED);
+	while(x1<xn)
+	{
+		x1++;
+		if(p<0)
+		{
+			p=p+s;
+		}
+		else
+		{
+			y1++;
+			p=p+t;
+		}
+		putpixel(x1,y1,RED);
+		
+	}
+}