题解 | KiKi定义电子日历类

#include <stdio.h>

// write your code here......
typedef struct date date_t;
typedef struct date {
    int year;
    int month;
    int day;
    void (*init)(date_t* d);
    void (*set)(date_t* d, int year, int month, int day);
    void (*print)(const date_t* d);
} date_t;

void date_init(date_t* d) {
    d->year = 0;
    d->month = 0;
    d->day = 0;
}

void date_set(date_t* d, int year, int month, int day) {
    d->year = year;
    d->month = month;
    d->day = day;
}

void date_print(const date_t* d) {
    printf("%d/%d/%d\n", d->day, d->month, d->year);
}

int main() {

    int a, b, c;
    scanf("%d%d%d", &a, &b, &c);

    // write your code here......
    date_t mydate = {
        .init = date_init,
        .set = date_set,
        .print = date_print
    };

    mydate.init(&mydate);
    mydate.set(&mydate, a, b, c);
    mydate.print(&mydate);

    return 0;
}