switch在linux用法

switch (expression) {
    case constant1:
        // code to be executed if expression == constant1
        break;
    case constant2:
        // code to be executed if expression == constant2
        break;
    // more cases can be added here
    default:
        // code to be executed if none of the above cases are true
}

#include <stdio.h>

int main() {
    int choice;

    printf("Enter a number between 1 and 3: ");
    scanf("%d", &choice);

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

    return 0;
}

switch (expression) {
    case constant1:
    case constant2:
        // shared code for constant1 and constant2
        break;
    default:
        // default code
}