基于C++编写的简单的日期计算器，供大家参考，具体内容如下

以下代码是在VS2013下编译运行的：

下面展示我的测试结果：

标题

代码如下：

#include<iostream>using namespace std;#include"vld.h"//这个是检测虚拟内存是否泄露，我在这里安装了vld，所以直接用，包含头文件就好了 class Date{public: //构造函数 Date(int year=2018, int month=8, int day=16) { _year = year; _month = month; _day = day; } //析构函数 ~Date() { } //拷贝构造函数 Date(const Date& d)//必须传引用，传值会引发无穷递归调用 { _year = d._year; _month = d._month; _day = d._day; } //赋值重载 Date& operator=(const Date& d) { if (this != &d) { this->_year = d._year; this->_month = d._month; this->_day = d._day; } return *this; } //打印输出 void showDate() { cout << "原来的日期：" << _year << "-" << _month << "-" << _day << endl; } void showDate1() { cout << "加上指定天数：" << _year << "-" << _month << "-" << _day<<endl; } void showDate2() { cout << "减去指定天数：" << _year << "-" << _month << "-" << _day << endl; } void showDate3() { cout << "加等指定天数：" << _year << "-" << _month << "-" << _day << endl; } void showDate4() { cout << "减等指定天数：" << _year << "-" << _month << "-" << _day << endl; } void showDate5() { cout << "前置++：" << _year << "-" << _month << "-" << _day << endl; } void showDate6() { cout << "后置++：" << _year << "-" << _month << "-" << _day << endl; } void showDate7() { cout << "前置--：" << _year << "-" << _month << "-" << _day << endl; } void showDate8() { cout << "后置--：" << _year << "-" << _month << "-" << _day << endl; } void showDate9() { cout << "要比较的日期：" << _year << "-" << _month << "-" << _day << endl; } bool operator ==(const Date& d)//判断两个日期相等 { return _year == d._year &&_month == d._month &&_day == d._day; } bool operator !=(const Date& d)//判断两个日期不相等 { return !(*this == d); } bool operator>(const Date& d) // > { if ((_year > d._year) || (_year ==d._year&&_month > d._month) || (_year ==d._year&&_month == d._month&&_day > d._day)) { return true; } return false; } bool operator>=(const Date& d)// >= { return ((*this == d) || *this > d); } bool operator<(const Date& d) // < { if ((_year <d._year) || (_year ==d._year&&_month <d._month) || (_year == d._year&&_month ==d._month&&_day < d._day)) { return true; } return false; } bool operator<=(const Date& d) //<= { return ((*this == d) || *this > d); } //是否是润年 bool IsLeapYear(int year) { return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); } int GetDayByYearAndMonth(int year, int month)//判断返回的月份的天数 { int MonthDay[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; if (IsLeapYear(year) && month == 2) { return 29; } else{ return MonthDay[month]; } } //日期加上天数，并不会改变原来的日期值 Date operator+(int dayNum) { if (_day<0) { return *this -(-_day); } Date tmpDate(*this);//拷贝this指针 tmpDate._day += dayNum; while (tmpDate._day > GetDayByYearAndMonth(_year, _month)) { tmpDate._day = tmpDate._day -GetDayByYearAndMonth(tmpDate._year,tmpDate._month); tmpDate._month += 1; if (tmpDate._month > 12) { ++tmpDate._year; tmpDate._month = 1; } } return tmpDate; } Date& operator+=(int days)// +=,会改变原来的值，进而在原来的值上面继续加指定的天数 { _day += days; while (_day > GetDayByYearAndMonth(_year, _month)) { _day =_day - GetDayByYearAndMonth(_year,_month); _month += 1; if (_month > 12) { ++_year; _month = 1; } } return *this; } Date& operator++() //前置++ { *this += 1; return *this; } Date operator++(int)//后置++ { Date tmpDate(*this); *this += 1; return *this; } //日期减去天数，并不会改变原来的日期值 Date operator-(int dayNum) { Date tmpDate(*this); tmpDate._day -= dayNum; while (tmpDate._day <0) { tmpDate._month -= 1; if (tmpDate._month <= 0) { --tmpDate._year; tmpDate._month = 12; } tmpDate._day += GetDayByYearAndMonth(tmpDate._year,tmpDate._month) ; } return tmpDate; } Date& operator-=(int dayNum)//-=,会改变原来的值，进而在原来的值上面继续减指定的天数 { _day -= dayNum; while (_day <0) { _month -= 1; if (_month <= 0) { --_year; _month = 12; } _day += GetDayByYearAndMonth(_year,_month); } return *this; } Date& operator--()//前置– { *this -= 1; return *this; } Date operator--(int)//后置 – { Date tmpDate(*this);//先对*this进行拷贝 *this -= 1; return *this; } int operator-( const Date& d) // 两个日期相隔天数 { Date big(*this); Date small(d); int day = 0; int flags = 1; if (big <small) { small = *this; big = d; flags *= -1; } while (small != big) { small =small+1; ++day; } return day*flags; } private://私有成员变量 int _year; int _month; int _day;}; int main(){ Date d1(2018,1,1); d1.showDate(); Date d2; d2 = d1 + 66; d2.showDate1(); d2 = d1 + 1; d2.showDate1(); Date d3; d3 = d1 - 20; d3.showDate2(); Date d4; d4+=10; d4.showDate3(); d4 += 10; d4.showDate3(); Date d5; d5 -= 10; d5.showDate4(); d5-= 10; d5.showDate4(); Date d6; ++d6; d6.showDate5(); Date d7; d7++; d7.showDate6(); Date d8; d8--; d8.showDate7(); Date d9; d9--; d9.showDate8(); Date d10(2018, 8, 18); d10.showDate9(); cout << "(d1 < d10):是否小于(1:表示小于 0表示：大于等于):"<<(d1 < d10) << endl; Date d11(2018,1,1); d11.showDate9(); cout <<"(d1 > d10):是否大于(1:表示大于 0表示小于等于)"<< (d1 > d10) << endl; Date d12(2018,8,18); d12.showDate9(); cout <<"(d1 >= d10):是否大于等于(0:表示小于 1表示：大于等于)"<< (d1 >= d10) << endl; Date d13(2018,10,1); d13.showDate9(); cout <<"(d1 <= d10):是否小于等于(1:表示小于等于 0表示：大于)"<< (d1 <= d10) << endl; Date d14(2018,1,2); d14.showDate(); cout << "两个日期相距天数：" <<(d1-d14) << endl; system("pause"); return 0;}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。