Untitled

#include<stdlib.h>
#include<stdio.h>
#include <GL/glut.h>
#include <GL/gl.h>

void circlePoints(int xc, int yc,int x, int y)
{
    glVertex2i(xc + x, yc + y);
    glVertex2i(xc - x, yc + y);
    glVertex2i(xc + x, yc - y);
    glVertex2i(xc - x, yc - y);
    glVertex2i(xc + y, yc + x);
    glVertex2i(xc - y, yc + x);
    glVertex2i(xc + y, yc - x);
    glVertex2i(xc - y, yc - x);
}

void bresenhamCircle(int xc, int yc, int r) {
    int x = 0, y = r;
    int d = 3 - 2 * r;

    glBegin(GL_POINTS);
    while (y >= x) {
        circlePoints(xc, yc, x, y);
        x++;
        if (d > 0)
        {
            y--;
            d = d + 4 * (x - y) + 10;
        }
        else
        {
            d = d + 4 * x + 6;
        }
    }
    glEnd();
}

void drawCirclemidPoint(int xc, int yc, int r)
{
    int x = 0;
    int y = r;
    int p = 1 - r;

    glBegin(GL_POINTS);
    circlePoints(xc,yc,x, y);
    while (x < y)
    {
        x++;
        if (p < 0)
        {
            p += 2 * x + 1;
        }
        else
        {
            y--;
            p += 2 * (x - y) + 1;
        }
        circlePoints(xc,yc,x, y);
    }
    glEnd();
}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT);
    drawCirclemidPoint(50, 50, 30);
    bresenhamCircle(50, 50, 30);
    glFlush();
}

void init() {
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(100, 100);
    glutInitWindowPosition(100, 100);
    glutCreateWindow("Midpoint Circle Algorithm");
    glClearColor(0.0, 0.0, 0.0, 0.0);
    gluOrtho2D(0, 100, 0, 100);
}
int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    init();
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;
}