日期格式化

#include<stdio.h>

int main(void)
{
    int year = 0;
    int month = 0;
    int day = 0;

    scanf_s("%2d-%2d-%4d", &month,&day,&year);

    printf("%04d-%02d-%02d
", year,month,day);

    return 0;
}

控制输入输出的格式。