帮我优化代码#include <stdio.h> #include <stdlib.h> #include <string.h> #define BLUE "\033[34m" #define CYAN "\033[36m" #define GREEN "\033[32m" #define RED "\033[31m" #define RESET "\033[0m" #define YELLOW "\033[33m" const char* logo = " ____ __\n / __ )____ _/ /_____ _\n / __ / __ `/ __/ __ `/ \n / /_/ / /_/ / /_/ /_/ / \n/_____/\\__,_/\\__/\\__,_/ \n"; const char* welcome = "欢迎使用模拟 QQ 登录界面\n"; const char* tip_user = "请输入用户名："; const char* tip_pwd = "请输入密码："; const char* success = "登录成功！\n"; const char* failure = "用户名或密码错误，登录失败！\n"; int main() { char username[20], password[20], buffer[256]; printf(CYAN "%s" RESET, logo); printf(BLUE "%s" RESET, welcome); printf(YELLOW "%s" RESET, tip_user); fgets(buffer, sizeof(buffer), stdin); sscanf(buffer, "%s", username); printf(YELLOW "%s" RESET, tip_pwd); fgets(buffer, sizeof(buffer), stdin); sscanf(buffer, "%s", password); if (strcmp(username, "qquser") == 0 && strcmp(password, "qqpassword") == 0) { printf(GREEN "%s" RESET, success); } else { printf(RED "%s" RESET, failure); } return 0; }

你的代码已经很简洁了，但是可以进行一些小优化：

1. 定义字符串常量时，可以使用 const char[] 来代替 const char*，这样更加安全。

2. 可以使用 fgets() 函数来获取用户输入，因为它可以避免缓冲区溢出的问题。

3. 在读取用户输入时，可以使用 sscanf() 函数来避免输入格式的错误。

4. 可以使用 strcmp() 函数来比较字符串是否相等，这样更加简洁。

下面是优化后的代码：

#include <stdio.h>
#include <string.h>

#define BLUE   "\033[34m"
#define CYAN   "\033[36m"
#define GREEN  "\033[32m"
#define RED    "\033[31m"
#define RESET  "\033[0m"
#define YELLOW "\033[33m"

const char logo[] = 
"    ____        __\n"
"   / __ )____ _/ /_____ _\n"
"  / __  / __ `/ __/ __ `/ \n"
" / /_/ / /_/ / /_/ /_/ /  \n"
"/_____/\\__,_/\\__/\\__,_/   \n";

const char welcome[] = "欢迎使用模拟 QQ 登录界面\n";
const char tip_user[] = "请输入用户名：";
const char tip_pwd[] = "请输入密码：";
const char success[] = "登录成功！\n";
const char failure[] = "用户名或密码错误，登录失败！\n";

int main() {
    char username[20], password[20], buffer[256];

    printf(CYAN "%s" RESET, logo);
    printf(BLUE "%s" RESET, welcome);

    printf(YELLOW "%s" RESET, tip_user);
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", username);

    printf(YELLOW "%s" RESET, tip_pwd);
    fgets(buffer, sizeof(buffer), stdin);
    sscanf(buffer, "%s", password);

    if (strcmp(username, "qquser") == 0 && strcmp(password, "qqpassword") == 0) {
        printf(GREEN "%s" RESET, success);
    } else {
        printf(RED "%s" RESET, failure);
    }

    return 0;
}