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KY258 日期累加

依次根据月份判断天数，再根据天数修改月份，最后根据月份修改年份，下面两题思路类似

#include 
   
    #include 
    
     #include 
     
      using namespace std;bool isLeapYear(int year) {
   	if (year % 400 == 0 || year % 4 == 0 && year % 100 != 0) return true;	else return false;}int main(){
   		int m;	cin >> m;	set
      
        bigMonth = {
    1,3,5,7,8,10,12 };	while (m > 0) {
   		int year, month, day;		int num;		cin >> year >> month >> day >> num;		while (num > 0) {
   			day++;			num--;			if (bigMonth.find(month) != bigMonth.end()) {
   				if (day > 31) {
   					month++;					day = 1;				}			}			else if (month==2) {
   				if (isLeapYear(year)) {
   					if (day > 29) {
   						month++;						day = 1;					}				}				else {
   					if (day > 28) {
   						month++;						day = 1;					}				}			}			else {
   				if (day > 30) {
   					month++;					day = 1;				}			}			if (month > 12) {
   				year++;				month = 1;			}		}		cout << year << "-" << right << setw(2) << setfill('0') << month << "-" << right << setw(2) << setfill('0') << day << endl;		m--;	}}
      
     
    
   

KY250 日期类

#include 
   
    #include 
    
     #include 
     
      using namespace std;bool isLeapYear(int year) {
   	if (year % 400 == 0 || year % 4 == 0 && year % 100 != 0) return true;	else return false;}int main(){
   		int m;	cin >> m;	set
      
        bigMonth = {
    1,3,5,7,8,10,12 };	while (m > 0) {
   		int year, month, day;		int num;		cin >> year >> month >> day;			day++;			if (bigMonth.find(month) != bigMonth.end()) {
   				if (day > 31) {
   					month++;					day = 1;				}			}			else if (month==2) {
   				if (isLeapYear(year)) {
   					if (day > 29) {
   						month++;						day = 1;					}				}				else {
   					if (day > 28) {
   						month++;						day = 1;					}				}			}			else {
   				if (day > 30) {
   					month++;					day = 1;				}			}			if (month > 12) {
   				year++;				month = 1;			}		cout << year << "-" << right << setw(2) << setfill('0') << month << "-" << right << setw(2) << setfill('0') << day << endl;		m--;	}}
      
     
    
   

KY111 日期差值

#include 
   
    #include 
    
     #include 
     
      using namespace std;bool isLeapYear(int year) {
   	if (year % 400 == 0 || year % 4 == 0 && year % 100 != 0) return true;	else return false;}int main(){
   		set
      
        bigMonth = {
    1,3,5,7,8,10,12 };		int s1, s2;		int year, month, day;		int year2, month2, day2;		int num = 1;		cin >> s1;		cin >> s2;		year = s1 / 10000;		year2 = s2 / 10000;		month = s1 / 100 % 100;		month2 = s2 / 100 % 100;		day = s1 % 100;		day2 = s2 % 100;		while (!(year == year2 && month == month2 && day == day2)) {
   			day++;			num++;			if (bigMonth.find(month) != bigMonth.end()) {
   				if (day > 31) {
   					month++;					day = 1;				}			}			else if (month == 2) {
   				if (isLeapYear(year)) {
   					if (day > 29) {
   						month++;						day = 1;					}				}				else {
   					if (day > 28) {
   						month++;						day = 1;					}				}			}			else {
   				if (day > 30) {
   					month++;					day = 1;				}			}			if (month > 12) {
   				year++;				month = 1;			}					}		cout << num;}
      
     
    
   

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