日期处理器 高质量C语言程序

设计题目：日期处理器2012年 09 月 06 日【程序功能简介】：程序能处理如2-12-2004或2/12/2004等格式的日期处理，并能进行日期的加法计算，输入日期的字符串形式，如1-MAR ——2003，同时还能进行两个日期的大小比较，返回两个日期相差的天数及月份数*【课程设计要求】*1将日期加天数的成员函数void AddDays (int days)改为重载+运算符2将计算两个日期相差天数的成员函数int FindDifferenceInDays(DateFormatter)改为重载—运算符3设计重载运算符‘—’的函数，实现日期对象减去天数的功能4设计重载运算符‘++’，‘——’的函数，实现日期对象自加、自减的功能5设计重载输入输出流函数，实现日期对象的输入、输出操作，要求输入能自动识别多种格式的日期方式，若日期数据有错（如输入的月份为13月等能自动予以提示并重新输入，输出时能同时输出各种格式的日期6修改main函数结构，采用菜单选项的形式，分别测试成员函数或重载运算符函数的功能注：运算符重载函数既可重载为成员函数也可以重载为友元函数*【源程序分析（包括结构、模块、功能）】*#include<iostream.h>#include<iomanip.h>#include<time.h>#include<string>using namespace std;class DateFormatter //日期格式类{private:int day;int mon;int year;public:DateFormatter();DateFormatter(int day,int mon,int year);DateFormatter(char* date);inline int GetDay(){ return day;} //返回日期inline int GetMonth(){ return mon;} //返回月份inline int GetYear(){ return year;} //返回年份inline void SetDay(int d){day=d;} //设置日期inline void SetMonth(int m){mon=m;} //设置月份inline void SetYear(int y){year=y;} //设置年份inline bool IsLeapYear() //查看是否是闰年{if(year%4==0&&year%100!=0||year%400==0){return true;}else {}}void AddDays(int days); //在日期上加上天数void MinDays(int days); //在日期上减去天数void IncrementMonth(); //在日期上加上月份char* GetDate();char* Time(int days,int mon,int year);int FindDifferenceInMonths(DateFormatter); //返回两个日期间月份的差值int FindDifferenceInDays(DateFormatter); //返回两个日期间天数的差值int FindDifferenceInMonth(DateFormatter);int FindDifferenceInDay(DateFormatter);static char* Today() //返回当前系统时间的字符串{const time_t curr=time(0);tm *dt=localtime(&curr);int d=dt->tm_mday;int y=(dt->tm_year+1900);int m=dt->tm_mon;char mn[4];strcpy(mn,FindMonth(m));char ret[25];strcpy(ret,FormatDate(d,mn,y));return ret;}char* GetFormattedDate();int operator<(DateFormatter df);int operator>(DateFormatter df);int operator==(DateFormatter df);int operator++();int operator--();private:static char* FindMonth(int m) //根据月份返回表示月份的字符串{ if(m==0) {return"JAN";}else if(m==1){return"FEB";}else if(m==2){return"MAR";}else if(m==3){return"APR";}else if(m==4){return"MAY";return"JUN";}else if(m==6){return"JUL";}else if(m==7){return"AUG";}else if(m==8){return"SEP";}else if(m==9){return"OCT";}else if(m==10){return"NOV";}else if(m==11){return"DEC";}else {return"NUL";}}int FindMonthInNumber(string m); //将用字符串表示的月份形式转换为数字形式static char* FormatDate(int d,char* m,int y) //将时间用字符串形式表示{char* dy=new char[25];char* yr=new char[25];dy=itoa(d,dy,10);yr=itoa(y,yr,10);strcat(dy,"-");strcat(dy,m);strcat(dy,"-");strcat(dy,yr);return dy;}string to_lower(string s); //将字符串中所有字母转换为小写int FindDaysInMonth(int m) //返回月份中的最大天数{ if(m==0){return 31;}else if(m==1){if(IsLeapYear()){return 29;}else {return 28;}}else if(m==2){return 31;return 30;}else if(m==4){return 31;}else if(m==5){return 30;}else if(m==6){return 31;}else if(m==7){return 31;}else if(m==8){return 30;}else if(m==9){return 31;}else if(m==10){return 30;}else if(m==11){return 31;}return -1;}};DateFormatter::DateFormatter() //构造函数，将成员数据赋值为当前系统时间{ const time_t curr=time(0);tm *dt=localtime(&curr);this->day=dt->tm_mday;this->mon=dt->tm_mon;this->year=(dt->tm_year+1900);}DateFormatter::DateFormatter(int day,int mon,int year) //构造函数，用指定时间设置成员函数{ this->day=day;this->mon=mon;this->year=year;}DateFormatter::DateFormatter(char* date) /*构造函数，将字符串表示的日期形式还原成整型，可以识别诸如1/1/03 1-12-2003等形式的字符串*/{if(strlen(date)>8){string s1=date;int p=s1.find_first_of('-'); //找到第一个'-'，如12-2-2003string day;string year;if(p==2){day=s1.substr(0,2); //取出日期month=s1.substr(3,3); //取出月份year=s1.substr(7,4); //取出年份}else if(p==1){day=s1.substr(0,1);month=s1.substr(2,3);year=s1.substr(6,4);}char cday[5];strcpy(cday,day.c_str()); //日期转换为字符串char cyear[5];strcpy(cyear,year.c_str());this->day=atoi(cday); //将字符串转换为整型数字this->mon=FindMonthInNumber(month);this->year=atoi(cyear);}else if(strlen(date)==8|| strlen(date)==7|| strlen(date)==6){ int len=strlen(date);string str=date;string day;string month;string year;int p1=str.find_first_of('-');if(p1<=0) p1=str.find_first_of('/'); //如果格式中无'-'，寻找'/' int p2=str.find_last_of('-');if(p2<=0) p2=str.find_last_of('/');if(len==8){day=str.substr(0,2); //同样将年、月、日转换成整型数字month=str.substr(3,2);year=str.substr(6,2);}else if(len==7){if(p1==1){day=str.substr(0,1);if(p2==3){month=str.substr(2,1);year=str.substr(4,2);}else{month=str.substr(2,2);year=str.substr(5,2);}}else{day=str.substr(0,2);month=str.substr(2,1);year=str.substr(4,2);}else{month=str.substr(3,2);year=str.substr(5,2);}}}else if(len==6){day=str.substr(0,1);month=str.substr(2,1);year=str.substr(4,2);}int m=atoi((month.c_str()));m-=1;int yr=atoi((year.c_str()));char y[5];if(yr>=0&&yr<=70) //再将年份前面补上世纪{ strcpy(y,"20");strcat(y,year.c_str());}else{strcpy(y,"19");strcat(y,year.c_str());}this->day=atoi((day.c_str()));this->mon=m;this->year=atoi(y);}}int DateFormatter::FindMonthInNumber(string m) //识别月份的英文形式，还原成整数{ if(to_lower(m)=="jan"){return 0;}else if(to_lower(m)=="feb"){return 1;}else if(to_lower(m)=="mar"){return 2;}else if(to_lower(m)=="apr"){return 3;}else if(to_lower(m)=="may"){return 4;}else if(to_lower(m)=="jun"){return 5;}else if(to_lower(m)=="jul"){return 6;return 7;}else if(to_lower(m)=="sep"){return 8;}else if(to_lower(m)=="oct"){return 9;}else if(to_lower(m)=="nov"){return 10;}else if(to_lower(m)=="dec"){return 11;}else{return -1;}}string DateFormatter::to_lower(string s) //将字符串中的大写转换成小写{ int len=s.length();for(int i=0;i<len;i++){if(s[i]>='A'&&s[i]<='Z'){s[i]=tolower(s[i]);}}return s;}char*DateFormatter::GetDate() //将以整型表示的日期转换为字符串的形式{ char* d=new char[25];char* m=new char[25];char* y=new char[25];d=itoa(day,d,10);m=itoa((mon+1),m,10);y=itoa(year,y,10);strcat(d,"/");strcat(d,m);strcat(d,"/");strcat(d,y);char ret[25];strcpy(ret,d);delete[]d;delete[]m;delete[]y;return ret;}char* DateFormatter::GetFormattedDate() //将用整数表示的时间改用字符串表示{ char mn[5];char ret[25];strcpy(ret,FormatDate(day,mn,year));return ret;}void DateFormatter::AddDays(int days) //日期加上天数成为一个新的日期，递归计算{ if(days<=0) return;int curr_day=this->day; //取对象当前日期int curr_mon=this->mon; //取对象当前月份int days_in_mon=FindDaysInMonth(curr_mon); //当前月份中共有多少天数if(this->mon==11&&days_in_mon==curr_day) //当月份为12月且当前日期为31天时{ this->year++; //对象年份加1}if(days_in_mon==curr_day) //当前日期计满时{ this->mon++; //当前月份加1this->day=0; //日期清零if(this->mon>11) //当前月份为12月，月份变为1月{ this->mon=0; }days_in_mon=FindDaysInMonth(this->mon); //新月份的天数}if(days<=days_in_mon) //相加的月数小于新月份的天数{ this->day+=days; //当前日期加上新天数if(this->day>days_in_mon) //若大于当前月份应有的天数{ this->mon++; //当前月份加1if(this->mon>11) //当前月份为12月，月份变为1月{ this->mon=0; }this->day-=days_in_mon; //当前天数标准化}return;}else //当相加的天数大于当前月份的天数时{ int days_to_add=days_in_mon-curr_day; //计算补满月份还需要的天数this->day+=days_to_add; //补满当前月份的天数if(this->day>days_in_mon) //天数多余当前月份{ this->day=1; //为第一号}int rem_days=days-days_to_add; //求出剩余的天数AddDays(rem_days); //递归计算return;}}期，递归计算{ if(days<=0) return;int curr_day=this->day; //取对象当前日期int curr_mon=this->mon; //取对象当前月份int days_in_mon;if(this->mon==0&&days_in_mon==1) //当月份为1月且当前日期为1天时{ this->year--; //对象年份减1}if(days<curr_day) //当相减的天数小于当前日期时{ this->day-=days;} //当前日期减去新天数else if(days==curr_day){this->mon--;this->day=FindDaysInMonth(this->mon);}else{this->mon--;days_in_mon=FindDaysInMonth(this->mon);int days_to_tot=days_in_mon+curr_day; //计算加上上个月的天数后的总天数if(days_to_tot>days) //总天数大于新天数{ this->day=days_to_tot-days; } //直接相减else if(days_to_tot==days){this->mon--;this->day=FindDaysInMonth(this->mon);}else{int rem_days=days-days_in_mon; //求出剩余的天数MinDays(rem_days); //递归计算return; }}}void DateFormatter::IncrementMonth() //月份加1{ mon++;if(mon>11){ mon=0;year++;}}int DateFormatter::FindDifferenceInMonths(DateFormatter dft) /*返回参数时间与对象时间相差的月份*/{ int diff=0;if(this->year==dft.year&&this->mon==dft.mon) return diff;if(dft.year>this->year){do{this->mon++;}while(this->year==dft.year&&this->mon==dft.mon);}else if(dft.year==this->year&&dft.mon>this->mon){do{this->mon++;diff++;}while(this->year==dft.year&&this->mon==dft.mon);}else{do{dft.mon++;diff++;}while(this->year==dft.year&&this->mon==dft.mon);}return diff;}int DateFormatter::FindDifferenceInDays(DateFormatter dft) //返回参数时间与对象时间相差的天数{ int diff=0;if(dft==*this) //参数时间等于对象时间{ return diff;} //返回差值while(dft>*this) //参数时间大于对象时间{ this->day++;diff++;dft++;}while(dft<*this) //参数时间小于对象时间{ dft.day++;diff++;dft++;}return diff;}int DateFormatter::operator<(DateFormatter df) //重载<运算符，对象时间大于参数时间返回1{ if(df.year>this->year){return 1;}else if(df.year==this->year&&df.mon>this->mon){return 1;}else if(df.mon==this->mon&&df.day>this->day){return 1;}else{return 0;}}int DateFormatter::operator>(DateFormatter df) //重载>运算符，对象时间小于参数时间返回1{ if(df.year<this->year){return 1;}else if(df.year==this->year&&df.mon<this->mon){return 1;}else if(df.mon==this->mon&&df.day<this->day){return 1;}else{return 0;}}int DateFormatter::operator==(DateFormatter df) //重载==运算符，对象时间等于参数时间返回1{ if((df.year==this->year)&&(df.mon==this->mon)&&(df.day==this->day)){return 1;}else{return 0;}}int DateFormatter::operator++() //重载++运算符{int curr_day=this->day; //取对象当前日期int curr_mon=this->mon; //取对象当前月份int days_in_mon=FindDaysInMonth(curr_mon); //当前月份中共有多少天数if(curr_day<days_in_mon){ //当天数少于该月最大天数this->day=curr_day+1;}else if(curr_mon<11){ //当月份小于12月this->mon=curr_mon+1;this->day=1;}else{ //年份加1this->year++;this->mon=1;this->day=1;}return 0;}int DateFormatter::operator--() //重载--运算符{int curr_day=this->day; //取对象当前日期int curr_mon=this->mon; //取对象当前月份if(curr_day>1){ //当天数多于1天this->day--;}else if(curr_mon>0){ //当月份大于一月this->mon--;this->day=FindDaysInMonth(this->mon);}else{ //年份减1this->year--;this->mon=12;this->day=30;}return 0;}char* DateFormatter::Time(int days,int mon,int year){int d;d=FindDaysInMonth(mon);if(days>d){ cout<<"您输入的日期有误，请重新输入"<<endl; }if(mon>11){ cout<<"您输入的月份有误，请重新输入"<<endl; }char mn[5];strcpy(mn,FindMonth(mon-1));char ret[25];strcpy(ret,FormatDate(days,mn,year));return ret;}int main() {int days=0;int mon=0;int year=0;char tmp[25],tmp2[25];DateFormatter dft("08/09/12");DateFormatter tmpdft("1/1/12");cout<<setw(30)<<"欢迎使用日期格式处理程序"<<'\n';cout<<setw(25)<<"制作人：林逸超"<<'\n';cout<<setw(27)<<"Today is:08/09/12 "<<endl;cout<<"1. 增加天数\n2. 减少天数\n3.日期比较\n4.日期自加\n5.日期自减\n0.退出\n";cout<<"请输入选择功能的相应序号：";int num;cin>>num;while(num){switch(num){case 1:cout<<"输入增加多少天"<<endl;cin>>days;dft.AddDays(days);strcpy(tmp,dft.GetFormattedDate());cout<<"结果是"<<tmp<<endl;cout<<"请输入选择功能的相应序号：";cin>>num;break;case 2:cout<<"输入减少多少天"<<endl;cin>>days;dft.MinDays(days);strcpy(tmp,dft.GetFormattedDate());cout<<"结果是"<<tmp<<endl;cout<<"请输入选择功能的相应序号：";cin>>num;break;case 3:cout<<"请按日/月/年的形式输入要比较的日期"<<endl;cin>>days>>mon>>year;strcpy(tmp,dft.GetFormattedDate());cout<<"First Date:"<<tmp<<endl;strcpy(tmp2,tmpdft.Time(days,mon,year));cout<<"Second Date:"<<tmp2<<endl;cout<<"Diff in days:"<<tmpdft.FindDifferenceInDays(dft)<<endl;cout<<"Diff in months:"<<tmpdft.FindDifferenceInMonths(dft)<<endl;cout<<"请输入选择功能的相应序号：";cin>>num;break;case 4:dft++;strcpy(tmp,dft.GetFormattedDate());cout<<"结果是"<<tmp<<endl;cout<<"请输入选择功能的相应序号：";cin>>num;break;case 5:dft--;strcpy(tmp,dft.GetFormattedDate());cout<<"结果是"<<tmp<<endl;cout<<"请输入选择功能的相应序号：";cin>>num;break;case 0:return 0;default:cout<<"您输入有误，请重新输入"<<endl;cout<<"请输入选择功能的相应序号：";cin>>num;break;}}return 0;}*【新程序设计思路】*1）类的结构该程序比较简单，类的结构也很合理，将课程设计中要求的各种重载运算符函数添加进去即可。