c语言触摸屏登陆界面代码

以下是一个基本的 C 语言触摸屏登陆界面的示例代码，您可以根据具体的需求进行自定义和扩展：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <fcntl.h>
#include <unistd.h>

#define USERNAME "admin"
#define PASSWORD "123456"

int getch(void)
{
    struct termios tm, tm_old;
    int fd = STDIN_FILENO, c;

    if (tcgetattr(fd, &tm) < 0) return -1;
    tm_old = tm;
    cfmakeraw(&tm);
    if (tcsetattr(fd, TCSANOW, &tm) < 0) return -1;
    c = getchar();
    if (tcsetattr(fd, TCSANOW, &tm_old) < 0) return -1;
    return c;
}

int main()
{
    int fd;
    char buf[16], *p;
    int n = 0;

    fd = open("/dev/input/event0", O_RDONLY);
    if (fd < 0) {
        perror("open");
        exit(1);
    }

    printf("Please enter your username and password:\n");
    printf("Username: ");

    while (1) {
        char ch = getch();
        if (ch == '\r' || ch == '\n') {
            buf[n] = '\0';
            break;
        } else if (ch == 127 || ch == '\b') {
            if (n > 0) {
                n--;
                printf("\b \b");
            }
        } else if (n < 15) {
            buf[n] = ch;
            n++;
            printf("*");
        }
    }

    printf("\nPassword: ");

    n = 0;
    while (1) {
        char ch = getch();
        if (ch == '\r' || ch == '\n') {
            buf[n] = '\0';
            break;
        } else if (ch == 127 || ch == '\b') {
            if (n > 0) {
                n--;
                printf("\b \b");
            }
        } else if (n < 15) {
            buf[n] = ch;
            n++;
            printf("*");
        }
    }

    printf("\n");

    if (strcmp(buf, USERNAME) == 0 && strcmp(buf + strlen(USERNAME) + 1, PASSWORD) == 0) {
        printf("Login successful!\n");
    } else {
        printf("Login failed!\n");
    }

    close(fd);
    return 0;
}

该示例代码通过读取 Linux 系统下的触摸屏设备文件 `/dev/input/event0`，实现了一个简单的用户名和密码登陆界面。您可以根据自己的实际需求，进行修改和扩展。