Linux编程：获取GMT(UTC)与Local时间，及其线程安全

Linux下可以通过：

struct tm * gmtime (const time_t * timer);        //获得gmt(UTC)时间

struct tm * localtime (const time_t * timer);      //获得本地时间

#include 
#include 
#include 
using namespace std;
 
string getTimeStr(struct tm* t)
{
	char tStr[50] = {0};
	snprintf(tStr, sizeof(tStr), "%04d-%02d-%02d %02d:%02d:%02d", (1900 + t->tm_year), ( 1 + t->tm_mon), t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
	return string(tStr);
}
 
int main(){
	time_t ts = time(nullptr);
	struct tm* tUTC = gmtime(&ts);
	cout<<"UTC time:"<<getTimeStr(tUTC)<
	struct tm* tLocal = localtime(&ts);
	cout<<"Local time:"<<getTimeStr(tLocal)<
	return 0;
}

运行程序输出：

UTC time:2022-08-21 03:54:53
Local time:2022-08-21 11:54:53