[游戏开发] C++借助运算符重载实现CDate类

开发: C++知识库 Java知识库 JavaScript Python PHP知识库人工智能区块链大数据移动开发嵌入式开发工具数据结构与算法开发测试游戏开发网络协议系统运维
教程: HTML教程 CSS教程 JavaScript教程 Go语言教程 JQuery教程 VUE教程 VUE3教程 Bootstrap教程 SQL数据库教程 C语言教程 C++教程 Java教程 Python教程 Python3教程 C#教程
数码: 电脑笔记本显卡显示器固态硬盘硬盘耳机手机 iphone vivo oppo 小米华为单反装机图拉丁

-> 游戏开发 -> C++借助运算符重载实现CDate类 -> 正文阅读

[游戏开发]C++借助运算符重载实现CDate类

1.创建CDate类

class CDate{
	public:
		CDate(int y=2002,int m=4,int d=7,int c=0){
			year=y;
			month=m;
			day=d;
			cnt=c;
		}
		void print(){
			cout<<year<<"年"<<month<<"月"<<day<<"日"<<endl;
		} //打印函数
		operator int(){
			return cnt;
		} //类型转换
		friend CDate operator+(CDate ob,int x); //友元运算符重载，计算日期加上天数
		friend CDate operator-(CDate ob,int x); //友元运算符重载，计算日期减去天数
		friend CDate operator-(CDate obj1,CDate obj2); //计算两个日期之间的时间间隔
	private:
		int year,month,day,cnt;
};

2.+运算符重载

CDate operator+(CDate ob,int x){
			CDate temp;
			int year_st=ob.year;
			int month_st=ob.month;
			int day_st=ob.day;
			for(int i=1;i<=x;i++){
				day_st++;
				if(month_st==2){
					int leap=(year_st%4==0&&year_st%100!=0)||(year_st%400==0);
					if(day_st>monthss[2]+leap){
						month_st++;
						day_st=1;
					}
				}else{
					if(day_st>monthss[month_st]){
						month_st++;
						day_st=1;
					}
				}
				if(month_st>=13){
					month_st=1;
					year_st++;
					day_st=1;
				}
			}
			temp.year=year_st;
			temp.month=month_st;
			temp.day=day_st;
			return temp;
}

3.-运算符重载

CDate operator-(CDate ob,int x){
	CDate temp;
	int year_st=ob.year;
	int month_st=ob.month;
	int day_st=ob.day;
	for(int i=0;i<x;i++){
				day_st--;
				if(day_st<=0){
					if(month_st==3){
						int leap=(year_st%4==0&&year_st%100!=0)||(year_st%400==0);
						day_st=monthss[2]+leap;
						month_st--;
					}else{
						if(month_st<=1) month_st=13,year_st--;
						month_st--;
						day_st=monthss[month_st];
					}
				}
			}
			temp.year=year_st;
			temp.month=month_st;
			temp.day=day_st;
			return temp;
}

4.-运算符重载2

CDate operator-(CDate obj2,CDate obj1){
	CDate temp;
	int year_st=obj1.year;
	int month_st=obj1.month;
	int day_st=obj1.day;
	int year_end=obj2.year;
	int month_end=obj2.month;
	int day_end=obj2.day;
	int cnt=temp.cnt;
	while(1){
				day_st++;
				cnt++;
				if(month_st==2){
					int leap=(year_st%4==0&&year_st%100!=0)||(year_st%400==0);
					if(day_st>monthss[2]+leap){
						month_st++;
						day_st=1;
					}
				}else{
					if(day_st>monthss[month_st]){
						month_st++;
						day_st=1;
					}
				}
				if(month_st>=13){
					month_st=1;
					year_st++;
					day_st=1;
				}
		if(year_st==year_end&&month_st==month_end&&day_st==day_end) break;
	}
	temp.cnt=cnt;
	temp.year=year_st;
	temp.month=month_st;
	temp.day=day_st;
	return temp;
}

5.完整代码

#include<iostream>
using namespace std;
int monthss[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
class CDate{
	public:
		CDate(int y=2002,int m=4,int d=7,int c=0){
			year=y;
			month=m;
			day=d;
			cnt=c;
		}
		void print(){
			cout<<year<<"年"<<month<<"月"<<day<<"日"<<endl;
		}
		operator int(){
			return cnt;
		}
		friend CDate operator+(CDate ob,int x);
		friend CDate operator-(CDate ob,int x);
		friend CDate operator-(CDate obj1,CDate obj2);
	private:
		int year,month,day,cnt;
};
CDate operator+(CDate ob,int x){
			CDate temp;
			int year_st=ob.year;
			int month_st=ob.month;
			int day_st=ob.day;
			for(int i=1;i<=x;i++){
				day_st++;
				if(month_st==2){
					int leap=(year_st%4==0&&year_st%100!=0)||(year_st%400==0);
					if(day_st>monthss[2]+leap){
						month_st++;
						day_st=1;
					}
				}else{
					if(day_st>monthss[month_st]){
						month_st++;
						day_st=1;
					}
				}
				if(month_st>=13){
					month_st=1;
					year_st++;
					day_st=1;
				}
			}
			temp.year=year_st;
			temp.month=month_st;
			temp.day=day_st;
			return temp;
}
CDate operator-(CDate ob,int x){
	CDate temp;
	int year_st=ob.year;
	int month_st=ob.month;
	int day_st=ob.day;
	for(int i=0;i<x;i++){
				day_st--;
				if(day_st<=0){
					if(month_st==3){
						int leap=(year_st%4==0&&year_st%100!=0)||(year_st%400==0);
						day_st=monthss[2]+leap;
						month_st--;
					}else{
						if(month_st<=1) month_st=13,year_st--;
						month_st--;
						day_st=monthss[month_st];
					}
				}
			}
			temp.year=year_st;
			temp.month=month_st;
			temp.day=day_st;
			return temp;
}
CDate operator-(CDate obj2,CDate obj1){
	CDate temp;
	int year_st=obj1.year;
	int month_st=obj1.month;
	int day_st=obj1.day;
	int year_end=obj2.year;
	int month_end=obj2.month;
	int day_end=obj2.day;
	int cnt=temp.cnt;
	while(1){
				day_st++;
				cnt++;
				if(month_st==2){
					int leap=(year_st%4==0&&year_st%100!=0)||(year_st%400==0);
					if(day_st>monthss[2]+leap){
						month_st++;
						day_st=1;
					}
				}else{
					if(day_st>monthss[month_st]){
						month_st++;
						day_st=1;
					}
				}
				if(month_st>=13){
					month_st=1;
					year_st++;
					day_st=1;
				}
		if(year_st==year_end&&month_st==month_end&&day_st==day_end) break;
	}
	temp.cnt=cnt;
	temp.year=year_st;
	temp.month=month_st;
	temp.day=day_st;
	return temp;
}
int main(){
	CDate bir(2002,4,7);
	CDate bir2(2022,4,20);
	//bir=bir+10;
	//bir2=bir2-10;
	cout<<"起始日期："<<endl;
	bir.print();
	cout<<"终止日期："<<endl; 
	bir2.print();
	cout<<"时间间隔："<<endl;
	cout<<(bir2-bir);
	return 0;
}