C语言实现时间转换

小鱼儿 2022-03-07 19:18 233阅读 0赞

**注意：**  
注意对闰年以及2月份天数的处理。

/*------------------------------------
    功能：实现时间转换
    要求输出一个比输入时间晚16小时的时间;
    数据格式为：年 月 日 时 分;
    输入示例：
    3
    2008 03 01 08 30
    2018 01 01 09 30
    2019 12 31 24 30
    输出示例：
    2008 02 29 16 30
    2017 12 31 17 30
    2019 12 31 08 30
    -------------------------------------
    Author: Zhang Kaizhou
    Date: 2019-3-17 15:32:04
    ------------------------------------*/
    #include <stdio.h>
    #include <stdlib.h>
    #define N 10
    
    typedef struct node{
        int year, month, day, hour, minute;
        struct node * pnext;
    } Node;
    
    void time_transform(Node * p);
    void list_tail_insert(Node ** pphead, Node ** pptail, Node * p);
    void list_print(Node * phead);
    
    int main(){
        Node * phead = NULL, * ptail = NULL;
        int n, i;
        scanf("%d", &n);
        for(i = 0; i < n; i++){
            Node * pnew = (Node *)calloc(1, sizeof(Node));
            scanf("%d %d %d %d %d", &pnew->year, &pnew->month, &pnew->day, &pnew->hour, &pnew->minute);
            time_transform(pnew);
            list_tail_insert(&phead, &ptail, pnew);
        }
        list_print(phead);
    
        return 0;
    }
    
    void time_transform(Node * p){
        if(p->hour >= 16){ // 小时大于等于16时
            p->hour = p->hour - 16;
        }else{ // 小时小于16时
            if(p->day > 1){
                p->day -= 1;
                p->hour = p->hour + 8;
            }else{ // day = 1时
                if(p->month > 1){
                    p->month -= 1;
                    if(p->month == 1 || p->month == 3 || p->month == 5 || p->month == 7 ||
                       p->month == 8 || p->month == 10 || p->month == 12){
                        p->day = 31;
                    }else if(p->month == 2){
                        if((p->year % 4 == 0 && p->year % 100 != 0) || p->year % 400 == 0){
                            p->day = 29;
                        }else{
                            p->day = 28;
                        }
                    }else{
                        p->day = 30;
                    }
                    p->hour = p->hour + 8;
                }else{ // 在一月一日时
                    p->year -= 1;
                    p->month = 12;
                    p->day = 31;
                    p->hour = p->hour + 8;
                }
            }
        }
        return;
    }
    
    void list_tail_insert(Node ** pphead, Node ** pptail, Node * p){
        if(* pphead == NULL){
            * pphead = p;
            * pptail = p;
        }else{
            (* pptail)->pnext = p;
            * pptail = p;
        }
        return;
    }
    
    void list_print(Node * phead){
        while(phead != NULL){
            printf("%d %02d %02d %02d %02d\n", phead->year, phead->month, phead->day, phead->hour, phead->minute);
            phead = phead->pnext;
        }
        return;
    }