Sinux

#include <X11/Xlib.h>
#include <unistd.h> //Sleep();
#include <math.h> //Sinus: sin();
#include <stdio.h> // getchar(); etc...

int main(){
    //Creates Window
    Display *display;
    Window window, rootwindow;
    int screen;

    display = XOpenDisplay(NULL);
    screen = DefaultScreen(display);
    rootwindow = RootWindow(display,screen);

    printf("Window Dimensions: ");
    int width,height;
    scanf("%d %d",&width,&height);

    //Sets foreground and background of the window
    GC gc;
    int screen_num = DefaultScreen(display);


    bg:
    printf("Foreground Color (white=0,black=1): ");
    int fcolor;
    scanf("%d",&fcolor);
    if(fcolor == 0){
        XSetForeground(display,gc,WhitePixel(display,screen_num));
        XSetBackground(display,gc,BlackPixel(display,screen_num));
        window = XCreateSimpleWindow(display, rootwindow,0, 0, width, height, 1,BlackPixel(display,screen_num),WhitePixel(display,screen_num));
    } else if(fcolor == 1){
        XSetForeground(display,gc,BlackPixel(display,screen_num));
        XSetBackground(display,gc,WhitePixel(display,screen_num));
        window = XCreateSimpleWindow(display, rootwindow,0, 0, width, height, 1,WhitePixel(display,screen_num),BlackPixel(display,screen_num));
    } else {
        printf("Error! Goto to fcolor\n");
        goto bg;
    }

    //window = XCreateSimpleWindow(display, rootwindow,0, 0, width, height, 1, 0, 0);
    XMapWindow(display, window);
    XFlush(display);
    XGCValues values;
    gc = XCreateGC(display,window,0,&values);

    //creates lines definitions

    int line_width = 2;
    int line_style = LineSolid;
    int cap_style = CapButt;
    int join_style = JoinBevel;

    XSetLineAttributes(display,gc,line_width,line_style,cap_style,join_style);
    XSetFillStyle(display,gc,FillSolid); //Fill style for GC

    //XSetForeground(display,gc,WhitePixel(display,screen_num));

    //End of creating window...

    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(display,window,gc,xi,yi);
        }
    }

    XDrawLine(display,window,gc,500,5,400,34);


    XMapWindow (display, window);
    XFlush (display);
    getchar();
    sleep(5);
    XCloseDisplay(display);
    return 0;
}