我这堂课有问题。当我只创建这个类的一个对象时，一切正常。它向我展示了它应该的日期。但每当我尝试创建第二个并打印出日期时，它只显示第二个对象的数据。我不知道自己做错了什么。
#include <iostream>
#include <string>
#include <time.h>
#include <conio.h>
using namespace std;
class convData {
public:
//constructori
convData(long dataUnix){
this->mytime = dataUnix;
this->mytm = NULL;
this->mytm = gmtime(&this->mytime);
this->wDay = NULL;
cout <<endl<<"Address:"<< &this->mytime;//noticed that this address is exactly the same as the one of the object created in main
}
~convData(){
if (this->wDay != NULL)
delete[] wDay;
}
//interfata
void setDataUnix(long dataUnix){
if (dataUnix >= 0)
this->mytime = dataUnix;
else
throw new exception("Data incorecta");
}
void setSec(int sec)
{
if (sec >= 0 && sec <= 59)
this->mytm->tm_sec = sec;
else
throw new exception("Numarul de secunde este incorect.");
}
void setMin(int min){
if (min >= 0 && min <= 59)
this->mytm->tm_min = min;
else
throw new exception("Numarul de minute este incorect.");
}
void setHour(int hour)
{
if (hour >= 0 && hour <= 23)
this->mytm->tm_hour = hour;
else
throw new exception("Ora este gresita.");
}
void setMday(int mDay)
{
if (mDay >= 1 && mDay <= 31)
this->mytm->tm_mday = mDay;
else
throw new exception("Ziua lunii incorecta.");
}
void setMonth(int month)
{
if (month >= 1 && month <= 11)
this->mytm->tm_mon = month - 1;
else
throw new exception("Luna este gresita");
}
void setYear(int year)
{
if (year >= 1970 && year <= 9999)
this->mytm->tm_year = year - 1900;
else
throw new exception("Anul este gresit");
}
void setWeekDay(string weekDay){
if (weekDay.compare("Duminica") == 0)
this->mytm->tm_wday=0;
else
if (weekDay.compare("Luni") == 0)
this->mytm->tm_wday = 1;
else
if (weekDay.compare("Marti") == 0)
this->mytm->tm_wday = 2;
else
if (weekDay.compare("Miercuri") == 0)
this->mytm->tm_wday = 3;
else
if (weekDay.compare("Joi") == 0)
this->mytm->tm_wday = 4;
else
if (weekDay.compare("Vineri") == 0)
this->mytm->tm_wday = 5;
else
if (weekDay.compare("Sambata") == 0)
this->mytm->tm_wday = 6;
else
throw new exception("Ziua saptamanii incorecta.");
}
void setYearDay(int yearDay){
if (yearDay >= 1 && yearDay <= 366)
this->mytm->tm_yday = yearDay - 1;
else
throw new exception("Ziua din an incorecta.");
}
void setDST(int DST)
{
if (DST == -1)
this->mytm->tm_isdst = DST;
else
if (DST == 0)
this->mytm->tm_isdst = DST;
else
if (DST >= 1)
this->mytm->tm_isdst = DST;
else
throw new exception("DST gresit.");
}
int getSec()
{
return this->mytm->tm_sec;
}
int getMin()
{
return this->mytm->tm_min;
}
int getHour(){
return this->mytm->tm_hour;
}
int getMday(){
return this->mytm->tm_mday;
}
int getMonth(){
return this->mytm->tm_mon+1;
}
int getYear(){
return (this->mytm->tm_year + 1900);
}
char * getWeekDay(){
if (this->mytm->tm_wday == 0)
{
this->wDay = new char[strlen("Duminica") + 1];
strcpy(this->wDay, "Duminica");
return this->wDay;
}
else if (this->mytm->tm_wday == 1)
{
this->wDay = new char[strlen("Luni") + 1];
strcpy(this->wDay, "Luni");
return this->wDay;
}
else if (this->mytm->tm_wday == 2)
{
this->wDay = new char[strlen("Marti") + 1];
strcpy(this->wDay, "Marti");
return this->wDay;
}
else if (this->mytm->tm_wday == 3)
{
this->wDay = new char[strlen("Miercuri") + 1];
strcpy(this->wDay, "Miercuri");
return this->wDay;
}
else if (this->mytm->tm_wday == 4)
{
this->wDay = new char[strlen("Joi") + 1];
strcpy(this->wDay,"Joi");
return this->wDay;
}
else if (this->mytm->tm_wday == 5)
{
this->wDay = new char[strlen("Vineri") + 1];
strcpy(this->wDay, "Vineri");
return this->wDay;
}
else if (this->mytm->tm_wday == 6)
{
this->wDay = new char[strlen("Sambata") + 1];
strcpy(this->wDay, "Sambata");
return this->wDay;
}
else
return "\0";
}
int getYearDay()
{
return this->mytm->tm_yday + 1;
}
int getDST(){
return this->mytm->tm_isdst;
}
long getDataUnix(){
long dataUnix = this->mytime;
return dataUnix;
}
void afisareData(){
cout << endl << getWeekDay();
cout << " " << getMday()<< "-"<< getMonth();
cout << "-" << getYear() << " " << getHour() << ":";
if (getMin() < 10)
cout << "0" << getMin();
else
cout << getMin();
if (getSec() < 10)
cout << ":0" << getSec();
else
cout<<":" << getSec();
cout << endl;
}
private:
time_t mytime;
struct tm *mytm;
char * wDay;
/*struct tm {
int tm_sec; /// Seconds (0-60)
int tm_min; // Minutes (0-59)
int tm_hour; // Hours (0-23)
int tm_mday; // Day of the month (1-31)
int tm_mon; // Month (0-11)
int tm_year; // Year - 1900
int tm_wday; // Day of the week (0-6, Sunday = 0)
int tm_yday; // Day in the year (0-365, 1 Jan = 0)
int tm_isdst; // Daylight saving time
};*/
};
void main(){
convData convObj(1439467747);
convData convObj2(1439469232);
cout << endl<<"First object address:" << &convObj;
cout <<endl;
convObj.afisareData();
cout << endl;
convObj2.afisareData();
}
答案 0 :(得分：0)
来自gmtime()文档here
将epoch（时间指向的time_t值）后的给定时间转换为日历时间，以struct tm格式的协调世界时（UTC）表示。 结果存储在静态存储中，并返回指向该静态存储的指针。
您正在使用相同的指针。
示例：
struct tm *temp;
time_t t1;
time_t t2;
t1 = 1439467747;
t2 = 1439469232;
temp = gmtime(&t1);
struct tm tmt1;
memcpy(&tmt1, temp, sizeof(tm));
temp = gmtime(&t2);
struct tm tmt2;
memcpy(&tmt2, temp, sizeof(tm));
cout << tmt1.tm_sec << endl;
cout << tmt2.tm_sec << endl;