c++的万年历类，支持显示某月月历与某年年历，支持计算任意两个日期的间隔天数

本文主要是介绍c++的万年历类，支持显示某月月历与某年年历，支持计算任意两个日期的间隔天数，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

#include <iostream> #include <vector> #include <iomanip> using namespace std; class Date { private:int year; //年份int month; //月份int day; //几号int days; //该月共有几天int lDays; //当前日期后面的天数，lDays=days-day;vector<int> myYear; //存放万年历日期排列的容器void Set(); //输入了日期后初始化days lDays myYear public:Date(int y=1900,int m=1,int d=0):year(y),month(m),day(d){myYear.resize(40);Set();}void Show()const;void showSign()const;void showAll()const;void Reset(int y,int m,int d=0);void clear();bool isR(int n);int operator-(const Date&); }; void Date::Show()const {cout<<" "<<year<<"年"<<month<<"月"<<"(";showSign();cout<<")"<<endl<<endl;cout<<setw(5)<<"日"<<setw(5)<<"一"<<setw(5)<<"二"<<setw(5)<<"三"<<setw(5)<<"四"<<setw(5)<<"五"<<setw(5)<<"六"<<endl;for(vector<int>::size_type i=0;i<myYear.size();i++){if(myYear[i]==0)cout<<setw(5)<<" ";elsecout<<setw(5)<<myYear[i];if((i+1)%7==0)cout<<endl;}cout<<endl; } void Date::Set() {short beginDay=1;for(int i=1901;i<=year;i++) //年份产生的初始位置的改变{if(!isR(i-1))beginDay++;elsebeginDay+=2;if(beginDay>6)beginDay%=7;}for(int i=2;i<=month;i++) //月份产生的初始位置的改变{switch(i-1){case 1:case 3:case 5:case 7:case 8:case 10:case 12:{beginDay+=3;if(beginDay>6)beginDay%=7;break;}case 2:{if(isR(year))beginDay++;if(beginDay>6)beginDay%=7;break;}default:{beginDay+=2;if(beginDay>6)beginDay%=7;break;}}}for(int i=0;i<31;i++) //将容器全部设置为31天myYear[beginDay+i]=i+1;switch(month) //重设尾部几天{case 4:case 6:case 9:case 11:{myYear[beginDay+30]=0;days=30;break;}case 2:{myYear[beginDay+30]=0;myYear[beginDay+29]=0;days=29;if(!isR(year)){myYear[beginDay+28]=0;days=28;}break;}default:{days=31;break;}}lDays=days-day; } void Date::Reset(int y,int m,int d) {this->clear();year=y;month=m;day=d;Set(); } bool Date::isR(int n) {if(n%100!=0&&n%4==0)return 1;else if(n%100==0&&n%400==0)return 1;elsereturn 0; } void Date::showSign()const {switch((year%1900)%12){case 0:cout<<"鼠";break;case 1:cout<<"牛";break;case 2:cout<<"虎";break;case 3:cout<<"兔";break;case 4:cout<<"龙";break;case 5:cout<<"蛇";break;case 6:cout<<"马";break;case 7:cout<<"羊";break;case 8:cout<<"猴";break;case 9:cout<<"鸡";break;case 10:cout<<"狗";break;case 11:cout<<"猪";break;} } void Date::showAll()const {Date da;for(int i=0;i<12;i++){da.Reset(this->year,i+1);da.Show();cout<<endl<<endl<<endl;da.clear();} } void Date::clear() {myYear.clear();myYear.resize(40); } int Date::operator-(const Date& da) {int sum=0;Date temp;if(this->year<da.year) //几个无法计算的提示{cout<<"必须以较早的日期减去较迟的日期！/n";return -1;}else if(this->year==da.year&&this->month<da.month){cout<<"必须以较早的日期减去较迟的日期！/n";return -2;}else if(this->year==da.year&&this->month==da.month&&this->day<da.day){cout<<"必须以较早的日期减去较迟的日期！/n";return -3;}else{if(year==da.year&&month==da.month&&day!=da.day) //同年同月不同日{return day-da.day;}if(year==da.year&&month>da.month) //同年不同月{for(int i=da.month+1;i<month;i++){temp.Reset(year,i);sum+=temp.lDays;}return sum+da.lDays+day;}else{for(int i=da.year+1;i<year;i++){if(isR(i))sum+=366;elsesum+=365;}for(int i=da.month+1;i<13;i++){temp.Reset(da.year,i);sum+=temp.lDays;}sum+=da.lDays;for(int i=1;i<month;i++){temp.Reset(year,i);sum+=temp.lDays;}sum+=day;return sum;}} }

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