{

float h = (float)getwindowheight();

float w = (float)getwindowwidth();

// calculate dx & dy

float dx = X1 - X0;

float 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 + w / 2, (h / 2) - Y, GREEN); // put pixel at (X,Y)

X += Xinc; // increment in x at each step

Y += Yinc; // increment in y at each step

}

{

int gd = DETECT, gm;

// Initialize graphics function

initgraph(&gd, &gm, "");

float h = (float)getwindowheight();

float w = (float)getwindowwidth();

DDA(-w / 2, 0, w / 2, 0);

DDA(0, h / 2, 0, -h / 2);

// Input values

int p[2][18] =

{

{50, 50, 50, 60, 60, 60, 60, 50, 60, 200, 200, 200, 200, 60, 60, 120, 120, 60},

{50, 200, 200, 200, 200, 50, 50, 50, 200, 200, 200, 120, 120, 120, 120, 160, 160, 200},

};

for (int i = 0; i < 18; i = i + 2)

{

DDA(p[0][i], p[1][i], p[0][i + 1], p[1][i + 1]);

}

getch();

return 0;