C++日程安排管理，一些步骤的意思不太明白
#include <stdio.h>#include <stdlib.h>
#include <string.h>
#include <time.h>
#define LEN sizeof(struct Calender)
//定义时间日期结构体
struct Date_time
{
int year;
int month;
int day;
int hour;
int min ;
};
//定义日程结构体
struct Calender
{
struct Date_time date;
struct Date_time remind_date;
char name[50] ;
char detail[100] ;
struct Calender *next;
}*head=NULL,*p0=NULL; //head为头指针,p0总是指向最后一个结点
char set[6];
//显示菜单
char Menu()
{
char choice[6];
printf("\n");
printf("\n◇◇◇◇◇◇◇◇◇◇◇欢迎使用日程安排系统◇◇◇◇◇◇◇◇◇◇\n");
printf("◇==========================================================◇\n");
printf("◇ 1)添加日程安排 ◇\n");
printf("◇ 2)删除日程信息 ◇\n");
printf("◇ 3)查询日程信息 ◇\n");
printf("◇ 4)显示日程安排 ◇\n");
printf("◇ 5)设置日程信息 ◇\n");
printf("◇ 6)修改日程安排 ◇\n");
printf("◇ 0)退出日程管理 ◇\n");
printf("◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇\n\n");
gets(choice);
return choice[0];
}
// 判断日程是否为空函数
int Empty_Calender()
{
if(head == NULL)
{
printf("日程不存在，请返回");
getchar();
return 1;
}
else
return 0;
}
//判断是否闰年
int is_leap(int year)
{
int leap=0;
if( (year % 4 == 0 && year%100 != 0) || ( year % 400 == 0 ) )
leap=1;
else
leap=0;
return leap;
}
//检查输入时间是否正确
int time_exam(struct Date_time time)
{
int right = 1;
int day_of_month[12]={31,28,31,30,31,30,31,31,30,31,30,31};
if( is_leap(time.year) == 1)
{
day_of_month[1]=29;
}
if(time.year > 9999 || time.year <= 0)
right=0;
if(time.month > 12 || time.month <= 0)
right=0;
if(time.day>day_of_month[time.month-1] || time.day <= 0)
right=0;
if(time.hour > 24 || time.hour < 0 )
right=0;
if(time.min > 60 || time.min < 0 )
right=0;
if(right == 0)
printf("输入错误！请重新输入\n");
return right;
}
//检查输入日期是否正确
int date_exam(int year,int month,int day)
{
int right = 1;
int day_of_month[12]={31,28,31,30,31,30,31,31,30,31,30,31};
if(is_leap(year)==1)
{
day_of_month[1]=29;
}
if(year > 9999 || year <= 1900)
right=0;
if(month > 12 || month <= 0)
right=0;
if(day>day_of_month[month-1] || day <= 0)
right=0;
if(right == 0)
printf("输入错误！\n");
return right;
}
//显示指针指向的日程事件信息
void print_program(struct Calender *p)
{
struct tm *newtime;
time_t long_time;
time(&long_time);
newtime=localtime(&long_time);//查找系统时间
printf("------------------------------\n");
printf("◇日程名称◇：%s\n",p->name);
printf("◇日程时间◇：%-4d-%-2d-%-2d %2d:%2d\n",
p->date.year,
p->date.month,
p->date.day,
p->date.hour,
p->date.min);
printf("◇日程详情◇:%s\n",p->detail);
printf("◇日程设置◇：\n");
printf("◇提醒时间◇：%-4d-%-2d-%-2d %-2d：%-2d\n",
p->remind_date.year,
p->remind_date.month,
p->remind_date.day,
p->remind_date.hour,
p->remind_date.min );
if( newtime->tm_year+1900 > p->date.year
|| newtime->tm_year+1900 == p->date.year
&& newtime->tm_mon+1 > p->date.month
|| newtime->tm_year+1900 == p->date.year
&& newtime->tm_mon+1 == p->date.month
&& newtime->tm_mday > p->date.day
|| newtime->tm_year+1900 == p->date.year
&& newtime->tm_mon+1 == p->date.month
&& newtime->tm_mday == p->date.day
&& newtime->tm_hour > p->date.hour
|| newtime->tm_year+1900 == p->date.year
&& newtime->tm_mon+1 == p->date.month
&& newtime->tm_mday == p->date.day
&& newtime->tm_hour == p->date.hour
&& newtime->tm_min >= p->date.min
)
{
printf("◇该日程信息已生效发生◇\n");
}
else
{
printf("◇该日程安排未生效◇\n");
}
printf("\n");
}
//按名称选择日程
struct Calender * select_name_program()
{
struct Calender *p;
char select_event[50];
int i=0;
printf("\n◇请输入日程名称◇：");
scanf("%s",select_event);
p=head;
printf("\n◇请确认日程信息◇：\n");
while( p !=NULL && strcmp(p->name,select_event) != 0)
p=p->next;
//如果没有找到指定日程
if(p == NULL)
{
printf("\n----------没有找到日程，请重新选择，任意键返回主界面--------\n");
getchar();
return NULL;
}
print_program(p);
return p;
}
//按时间选择日程
struct Calender * select_date_program()
{
struct Calender *p,*p_sel;
struct Date_time time;
int i=0;
char select_event[50];
p = head;
p_sel = NULL;
do
{
printf("\n◇请输入日程日期（年-月-日)◇：");
scanf("%d-%d-%d",&time.year,&time.month,&time.day);
}while(date_exam(time.year,time.month,time.day)==0);
printf("\n◇请确认日程信息◇：\n");
while(p != NULL)
{
if( p != NULL &&
( p->date.year == time.year
&& p->date.month == time.month
&& p->date.day == time.day))
{
p_sel = p;
print_program(p);
i++;
}
p = p->next;
}
//如果没有找到指定日程
if(i == 0)
{
printf("\n----------没有找到日程，请重新选择，任意键返回主界面--------\n");
getchar();
}
//如果找到一件符合时间条件的日程
else if(i == 1)
{
return p_sel;
}
//如果找到几件符合时间条件的日程，再按名称查找
else
{
printf("\n◇请选择日程◇：\n");
p_sel=select_name_program();
}
return p_sel;
}
//选择日程
struct Calender * select_program()
{
struct Date_time time;
struct Calender *p,*p1;
char select_event[50];
int sel =0;
do
{
printf("\n◇通过以下方式选择◇\n");
printf("1.◇输入日程名称◇\n");
printf("2.◇输入日程日期◇\n");
scanf("%d",&sel);
getchar();
if(sel == 1)
{
p=select_name_program();
}
else if(sel == 2)
{
p=select_date_program();
}
else
{
printf("\n选择错误！\n");
}
}while( sel !=1 && sel !=2);
return(p); //返回指向选中的日程的指针
}
//设置日程提醒日期
void set_remind_program(struct Calender *p)
{
do
{
printf("请输入日程提醒时间（年-月-日 时:分）:\n");
scanf("%d-%d-%d %d:%d",
&p->remind_date.year,&p->remind_date.month,&p->remind_date.day,
&p->remind_date.hour,&p->remind_date.min);
getchar();
}while(time_exam(p->remind_date) == 0);
}
//设置日程
void set_program(struct Calender *p)
{
int sel = 0;
int i=0;
char filename[100];
do{
printf("\n请选择：\n");
printf("1.设置提醒时间\n");
printf("0.退出操作\n");
scanf("%d",&sel);
getchar();
//第一次设置，把未设置的项目初始化
if(i == 1 && strcmp(set,"new") == 0)
{
if(sel == 0)
{
p->remind_date.year = 0000;
p->remind_date.month = 00;
p->remind_date.day = 00;
p->remind_date.hour = 00;
p->remind_date.min = 00;
}
else if(sel == 2)
{
p->remind_date.year = 0000;
p->remind_date.month = 00;
p->remind_date.day = 00;
p->remind_date.hour = 00;
p->remind_date.min = 00;
}
}
switch(sel)
{
case 0:
break;
case 1:
set_remind_program(p);
break;
default:
printf("\n选择错误！\n");
}
}while(sel != 0); //可多次设置直到选择0退出
}
//添加日程
void add_programe ()
{
struct Calender *p;
struct Date_time time;
char e_name[50];
char e_detail[100];
int sel = 0;
strcpy(set,"new");
do
{
printf("请输入日程日期，时间（格式为;年-月-日 时:分）:\n");
scanf("%d-%d-%d %d:%d",
&time.year,&time.month,&time.day,&time.hour,&time.min);
}while(time_exam(time)==0); //输入日程时间
printf("请输入日程名称 ：\n");
scanf("%s",e_name); //输入日程名称
printf("请输入日程详情说明：\n");
scanf("%s",e_detail); //输入日程详情
p=(struct Calender * )malloc(LEN);
strcpy(p->name, e_name);
strcpy(p->detail, e_detail);
p->date.year = time.year;
p->date.month = time.month;
p->date.day = time.day;
p->date.hour = time.hour;
p->date.min = time.min;
printf("1.进入设置\n");
printf("2.取消设置\n");
getchar();
scanf("%d",&sel);
if(sel == 1)
{
set_program(p);
}
else
{
p->remind_date.year = 0;
p->remind_date.month = 0;
p->remind_date.day = 0;
p->remind_date.hour = 0;
p->remind_date.min = 0;
}
//寻找插入位置，新添加的日程插到后面
if(head == NULL)
{
head = p0 = p;
p0->next = NULL;
}
else
{
p0->next = p;
p0 = p;
p0->next = NULL; //p0始终指向最后一个数据
}
}
//删除指定日程
void delet_event(struct Calender *p)
{
struct Calender *p_sel;
struct Calender *p_last;
int sel = 0;
int sure = 0;
p_sel = p_last = head;
while( p_sel != NULL
&& (
strcmp(p_sel->name,p->name) != 0
|| p_sel->date.year != p->date.year
|| p_sel->date.month != p->date.month
|| p_sel->date.day != p->date.day
|| p_sel->date.hour != p->date.hour
|| p_sel->date.min != p->date.min
)
)
{
p_last = p_sel;
p_sel =p_sel->next; //p_sel指向指定日程，p_last指向此日程的上一个
}
do
{
printf("1.删除此日程信息\n");
printf("2.删除此日程设置\n");
printf("0.退出操作\n");
scanf("%d",&sel);
getchar();
switch(sel)
{
case 0:
break;
case 1: //删除此日程事件
printf("确认删除？:\n");
printf("1.是\n");
printf("2.否\n");
scanf("%d",&sure);
getchar();
if(sure == 1)
{
if(p_sel == head && p_sel != NULL)
head=p_sel->next;
else if(p_sel != NULL)
p_last->next = p_sel->next;
}
break;
case 2: //删除此日程设置
printf("确认删除？:\n");
printf("1.是\n2.否\n");
scanf("%d",&sure);
getchar();
if(sure == 1)
{
p_sel->remind_date.year = 0000;
p_sel->remind_date.month = 00;
p_sel->remind_date.day = 00;
p_sel->remind_date.hour = 00;
p_sel->remind_date.min = 00;
}
break;
default:
printf("\n选择错误！请重新选择！\n");
}
}while(sel != 1 && sel != 2 && sel != 0);
}
//删除日程
void delet_program ()
{
struct Calender *p;
p=select_program();
if( p == NULL)
{
return;
}
getchar();
delet_event(p);
}
//查询提醒事件
void search_remind_program(int year,int month,int day)
{
struct Calender *p,*p_event;
p=head;
p_event = NULL;
printf("\n------------显示查询的日程信息----------\n\n");
while( p != NULL)
{
if( p->remind_date.year == year &&
p->remind_date.month == month &&
p->remind_date.day == day )
{
p_event = p;
print_program(p);
}
p = p->next;
}
//如果一直没有找到指定日程
if(p_event == NULL)
{
printf("\n-------------无查询日程-------------\n");
}
}
//查询某天事件
void search_day_program(int year,int month,int day)
{
struct Calender *p,*p_event;
p=head;
p_event = NULL;
printf("\n-----------显示查询日程----------\n");
while(p != NULL)
{
if( p->date.year == year &&
p->date.month == month &&
p->date.day == day )
{
p_event = p;
print_program(p);
}
p = p->next;
}
//如果一直没有找到指定日程
if(p_event == NULL)
{
printf("\n*----------无查询日程----------\n");
}
}
//查询指定日程，按名称查询
void search_name_program(char name[50])
{
struct Calender *p,*p_event;
p=head;
p_event = NULL;
printf("\n===========查询的日程信息如下==========\n\n");
while(p != NULL)
{
if(strcmp(p->name, name) == 0)
{
p_event = p;
print_program(p);
}
p = p->next;
}
//如果一直没有找到指定日程
if(p_event == NULL)
{
printf("\n----------无查询日程----------\n");
}
}
//查询日程
void search_program()
{
struct Date_time time;
char e_name[50];
int sel =0;
do
{
printf("\n请选择:\n");
printf("1.查询提醒日程\n");
printf("2.查询当日日程\n");
printf("3.查询指定日程\n");
printf("0.退出操作:\n");
scanf("%d",&sel);
getchar();
switch(sel)
{
case 0:
break;
case 1:
do
{
printf("请输入日程提醒日期（年-月-日）:\n");
scanf("%d-%d-%d",
&time.year,&time.month,&time.day);
getchar();
}while(date_exam(time.year,time.month,time.day)==0);
search_remind_program(time.year,time.month,time.day);
break;
case 2:
do
{
printf("请输入日程日期（年-月-日）:\n");
scanf("%d-%d-%d",
&time.year,&time.month,&time.day);
getchar();
}while(date_exam(time.year,time.month,time.day)==0);
search_day_program(time.year,time.month,time.day);
break;
case 3:
printf("请输入事件名称：");
scanf("%s",e_name);
getchar();
search_name_program(e_name);
break;
default:
printf("\n选择错误！\n\n");
}
}while(sel != 0);
}
//显示全部日程
void show_program()
{
struct Calender *p;
p=head;
if( Empty_Calender() == 1 )
return;
printf("\n--------------------全部日程信息如下----------------------\n");
while(p != NULL)
{
print_program(p);
p=p->next;
}
printf("\n----------------------------------------------------------\n");
printf("\n-----------------------按回车键返回-----------------------\n");
getchar();
}
//修改日程事件
void alter_program()
{
struct Calender *p;
struct Date_time time;
struct Date_time remind_time;
char e_name[50];
char e_detail[100];
int sel = 0;
p=select_program(); //选中日程事件
if( p == NULL)
{
printf("\n----------无查询信息----------\n");
getchar();
return;
}
do
{
printf("\n**请选择要修改的项目**\n");
printf("1.修改日程安排时间\n");
printf("2.修改日程安排名称\n");
printf("3.修改日程详情说明\n");
printf("4.更改日程提醒时间\n");
printf("0.退出修改\n");
scanf("%d",&sel);
getchar();
switch(sel)
{
case 0:
break;
case 1: //输入日程时间
do
{
printf("请输入日程日期，时间，格式为：（年-月-日 时-分）:\n");
scanf("%d-%d-%d %d-%d",
&time.year,&time.month,&time.day,&time.hour,&time.min);
}while(time_exam(time)==0);
p->date.year = time.year;
p->date.month = time.month;
p->date.day = time.day;
p->date.hour = time.hour;
p->date.min = time.min;
break;
case 2: //输入日程名称
printf("请输入日程事件名称：\n");
scanf("%s",e_name);
strcpy(p->name, e_name);
break;
case 3: //输入日程详情
printf("请输入日程详情说明：\n");
scanf("%s",e_detail);
strcpy(p->detail, e_detail);
break;
case 4: //输入提醒时间
do
{
printf("请输入提醒日程日期，时间（年-月-日 时：分）:\n");
scanf("%d-%d-%d %d:%d",
&remind_time.year,
&remind_time.month,
&remind_time.day,
&remind_time.hour,
&remind_time.min);
}while(time_exam(remind_time) == 0);
p->remind_date.year = remind_time.year;
p->remind_date.month = remind_time.month;
p->remind_date.day = remind_time.day;
p->remind_date.hour = remind_time.hour;
p->remind_date.min = remind_time.min;
break;
default:
printf("\n菜单选择错误！请重新选择！(0~6)\n");
}
}while( sel != 0);
}
int main()
{
struct Calender *p;
char choice;
char filename[100];
struct tm *newtime;
time_t long_time;
time(&long_time);
newtime=localtime(&long_time);
printf("现在时间：%d-%d-%d %d:%d\n", //从系统读取时间
newtime->tm_year+1900,
newtime->tm_mon+1,
newtime->tm_mday,
newtime->tm_hour,
newtime->tm_min);
do
{
choice=Menu();
switch(choice)
{
case'0':
printf("\n---------谢谢使用---------\n\n");
break;
case'1':
add_programe();
getchar();
break;
case'2':
delet_program();
break;
case'3':
search_program();
break;
case'4':
show_program();
break;
case'5':
strcpy(set,"reset");
p=select_program();
if( p == NULL)
{
printf("\n*****无查找信息*****\n");
getchar();
break;
}
set_program(p);
break;
case'6':
alter_program();
break;
default:
printf("菜单选择错误！请重新选择！");
}
}
while(choice != '0');
return 0;
}
程序可运行，从教材辅导书上看到这些结构，但不是很明白 p->xxx 的用法是什么意思。还有为何tm_year后面+1900
红字标注的地方求解释，好让我能明白后面相同结构的作用
程序代码：