Switch语句多次运行

#include <stdio.h>

int main() {
    int choice;
    printf("Enter your choice (1-3): ");
    scanf("%d", &choice);

    switch(choice) {
        case 1:
            printf("You selected option 1.\n");
            break;
        case 2:
            printf("You selected option 2.\n");
            break;
        case 3:
            printf("You selected option 3.\n");
            break;
        default:
            printf("Invalid choice!\n");
            break;
    }

    return 0;
}

int choice = 0; // 确保变量在每次运行前被重置
printf("Enter your choice (1-3): ");
scanf("%d", &choice);

switch(choice) {
    case 1:
        printf("You selected option 1.\n");
        break;
    case 2:
        printf("You selected option 2.\n");
        break;
    // 其他case...
}

switch(choice) {
    // 其他case...
    default:
        printf("Invalid choice! Please enter a number between 1 and 3.\n");
        break;
}