c++之获取当前时间

我以为有一个Date的类，不像Java，C++没有这个类，可以使用C库time.h的函数来获取当前时间，或者调用DOS的date

方法一：

#include <iostream>
#include <ctime>
#include<string>
using namespace std;

int main ()
{
  time_t rawtime;
  struct tm * timeinfo;

  time ( &rawtime );
  timeinfo = localtime ( &rawtime );
  cout<<"Current local time and date:"<< asctime (timeinfo)<<endl;
 system("pause");
  return 0;
}

方法二：

#include<iostream>
#include<ctime>
#include<string>
using namespace std;
int main(){
	time_t lltime;
	time(lltime);
	cout<<"the time is "<<ctime(lltime)<<endl;
	system("pause");
	return 0;
}

方法三：

include <ctime>
#include<string>
using namespace std;

#define CCT (+8)

int main ()
{
  time_t rawtime;
  struct tm * ptm;

  time ( &rawtime );

  ptm = gmtime ( &rawtime );
 
  cout<<"Beijing (China):"<<(ptm->tm_hour+CCT)%24<<":"<<ptm->tm_min<<endl;
  system("pause");
  return 0;
}

方法四：

#include<iostream>
#include<string>
#include<vector>
using namespace std;
int main(){
	system("time");
	system("pause");
	return 0;
}