使用枚举来执行函数？

#include <stdio.h>

enum Function {
    FUNCTION_A,
    FUNCTION_B,
    FUNCTION_C
};

void functionA() {
    printf("This is function A.\n");
}

void functionB() {
    printf("This is function B.\n");
}

void functionC() {
    printf("This is function C.\n");
}

int main() {
    enum Function func = FUNCTION_B;

    switch (func) {
        case FUNCTION_A:
            functionA();
            break;
        case FUNCTION_B:
            functionB();
            break;
        case FUNCTION_C:
            functionC();
            break;
        default:
            printf("Invalid function.\n");
            break;
    }

    return 0;
}

public class Main {
    enum Function {
        FUNCTION_A,
        FUNCTION_B,
        FUNCTION_C
    }

    public static void functionA() {
        System.out.println("This is function A.");
    }

    public static void functionB() {
        System.out.println("This is function B.");
    }

    public static void functionC() {
        System.out.println("This is function C.");
    }

    public static void main(String[] args) {
        Function func = Function.FUNCTION_B;

        switch (func) {
            case FUNCTION_A:
                functionA();
                break;
            case FUNCTION_B:
                functionB();
                break;
            case FUNCTION_C:
                functionC();
                break;
            default:
                System.out.println("Invalid function.");
                break;
        }
    }
}