Sinux2

/* include the X library headers */
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>

/* include some silly stuff */
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

/* here are our X variables */
Display *dis;
int screen;
Window win;
GC gc;

/* here are our X routines declared! */
void init_x();
void close_x();
void redraw();

main () {
    XEvent event;        /* the XEvent declaration !!! */
    KeySym key;        /* a dealie-bob to handle KeyPress Events */
    char text[255];        /* a char buffer for KeyPress Events */

    init_x();

    double r,a;
    printf("Repeat: ");
    scanf("%d",&r);
    printf("Amount: ");
    scanf("%d",&a);

    for(double yi=0;yi<r;yi++){
        yi=sin(yi);
        yi=yi*a;
        for(double xi=0;xi<r;xi++){
            xi=sin(xi);
            xi=xi*a;
            XDrawPoint(dis,win,gc,xi,yi);
        }
    }

    getchar();
    sleep(5);
    close_x();
}

void init_x() {
/* get the colors black and white (see section for details) */
    unsigned long black,white;

    dis=XOpenDisplay((char *)0);
       screen=DefaultScreen(dis);
    black=BlackPixel(dis,screen),
    white=WhitePixel(dis, screen);
    printf("Window height, width: ");
    int height,width;
    scanf("%d %d",&height,&width);
       win=XCreateSimpleWindow(dis,DefaultRootWindow(dis),0,0,height, width, 5,black, white);
    XSetStandardProperties(dis,win,"x11lib","template",None,NULL,0,NULL);
    XSelectInput(dis, win, ExposureMask|ButtonPressMask|KeyPressMask);
        gc=XCreateGC(dis, win, 0,0);
    XSetBackground(dis,gc,white);
    XSetForeground(dis,gc,black);
    XClearWindow(dis, win);
    XMapRaised(dis, win);
};

void close_x() {
    XFreeGC(dis, gc);
    XDestroyWindow(dis,win);
    XCloseDisplay(dis);
    exit(1);
};

void redraw() {
    XClearWindow(dis, win);
};