While，switch，fgets for menu

#include <stdio.h>

int main() {
    int choice;
    while (1) {
        printf("Menu:\n");
        printf("1. Option 1\n");
        printf("2. Option 2\n");
        printf("3. Option 3\n");
        printf("4. Exit\n");
        printf("Enter your choice: ");
        
        fgets(choice, sizeof(choice), stdin);
        
        switch (choice) {
            case 1:
                printf("You selected Option 1.\n");
                // 执行 Option 1 的操作
                break;
            case 2:
                printf("You selected Option 2.\n");
                // 执行 Option 2 的操作
                break;
            case 3:
                printf("You selected Option 3.\n");
                // 执行 Option 3 的操作
                break;
            case 4:
                printf("Exiting...\n");
                return 0;
            default:
                printf("Invalid choice. Please try again.\n");
        }
    }
    return 0;
}