C Program to Generate a Line using Digital differential Algorithm(DDA)

# include<stdio.h> 
# include<conio.h> 
# include <graphics.h> 
# include<math.h> 
/*function for plotting the point and drawing the line */ 
void ddaline(float x1,float y1,float x2,float y2) 
{ 
int i, color=5; 
float x,y, xinc, yinc, steps; 
steps=ads(x2-x1); 
if (steps<abs(y2-y1); 
steps=abs(y2-y1); 
xinc=(x2-x1)/steps; 
yinc=(y2-y1)/steps; 
x=x1; 
y=y1; 
putpixel((int)x,(int)y,color); 
for(i=1;i<=steps; i++) 
{ 
putpixel((int)x,(int)y,color); /* plots the points with specified color */ 
x=x+xinc; 
y=y=yinc; 
} 
{ 
/* The main program that inputs line end point and passes them to ddaline() 
function */ 
void main() 
{ 
 int gd=DETECT,gm,color: 
float x1,y1,x2,y2; 
printf(“\n enter the end points:\n”); 
scanf(“%f %f %f %f”,&x1,&y1,&x2,&y2); 
clrscr(); 
initgraph(&gd,&gm, “c:\\tc\\bgi”); 
ddaline(x1,y1,x2,y2); 
getch(); 
closegraph(); 
}