c语言写一个x客户端 libx11-dev

在C语言中编写一个X Window系统客户端通常需要利用libx11-dev库，这个库包含了创建和操作X11窗口的基本函数。下面是一个简单的示例，展示如何使用libx11库来创建一个基本的X11窗口程序：

#include <stdio.h>
#include <X11/X.h>      // Xlib header for windowing functions
#include <X11/Xutil.h>  // Xutil header for utility functions

int main(int argc, char *argv[]) {
    Display *display;   // Pointer to the display connection
    Window window;       // Handle for our new window
    int screen;          // Screen number
    Atom atom;           // Atom variable (used for event handling)

    // Initialize and connect to the display
    display = XOpenDisplay(NULL);
    if (!display) {
        fprintf(stderr, "Cannot open display\n");
        return 1;
    }

    // Get the default screen
    screen = DefaultScreen(display);

    // Create a root window with title "Hello World"
    window = XCreateSimpleWindow(display, RootWindow(display, screen),
                                 0, 0, 400, 300, 0, BlackPixel(display, screen), WhitePixel(display, screen));
    if (window == None) {
        fprintf(stderr, "Failed to create window\n");
        return 1;
    }

    // Map the window so it appears on the screen
    XMapWindow(display, window);

    // Wait for an event (in this case, we'll just exit)
    while (True) {
        XEvent event;
        XNextEvent(display, &event);
        if (event.type == ConfigureNotify) break;
    }

    // Clean up resources
    XDestroyWindow(display, window);
    XCloseDisplay(display);

    return 0;
}

要运行此程序，你需要先安装`libx11-dev`（对于Ubuntu和Debian系的Linux发行版）或相应的包（对于其他系统），它会包含Xlib库。