DDA algorithm

// C program for DDA line generation 
#include<stdio.h> 
#include<graphics.h> 

//Function for finding absolute value 
int abs (int n) 
{ 
	return ( (n>0) ? n : ( n * (-1))); 
} 

//DDA Function for line generation 
void DDA(int X0, int Y0, int X1, int Y1) 
{ 
	// calculate dx & dy 
	int dx = X1 - X0; 
	int dy = Y1 - Y0; 

	// calculate steps required for generating pixels 
	int steps = abs(dx) > abs(dy) ? abs(dx) : abs(dy); 

	// calculate increment in x & y for each steps 
	float Xinc = dx / (float) steps; 
	float Yinc = dy / (float) steps; 

	// Put pixel for each step 
	float X = X0; 
	float Y = Y0; 
	for (int i = 0; i <= steps; i++) 
	{ 
		putpixel (X,Y,RED); // put pixel at (X,Y) 
		X += Xinc;		 // increment in x at each step 
		Y += Yinc;		 // increment in y at each step 
		delay(100);		 // for visualization of line- 
							// generation step by step 
	} 
} 

// Driver program 
int main() 
{ 
	int gd = DETECT, gm; 

	// Initialize graphics function 
	initgraph (&gd, &gm, ""); 

	int X0 = 2, Y0 = 2, X1 = 14, Y1 = 16; 
	DDA(2, 2, 14, 16); 
	return 0; 
}