C++获取格式化时间的两种方式

/* time2 */

#include <iostream>

#include <ctime>

#include <cstring>

#include <iomanip>

using namespace std;

string get_time(void)

{

char buff[64] = {0};

time_t now = time(NULL);

tm *ltm = localtime(&now);

/* 2017-08-30 10:36:15 */

snprintf(buff, sizeof(buff), "%04d-%02d-%02d %02d:%02d:%02d",

1900 + ltm->tm_year, 1 + ltm->tm_mon, ltm->tm_mday, 

ltm->tm_hour,ltm->tm_hour, ltm->tm_min, ltm->tm_sec);

return buff;

}

string get_time2(void)

{

time_t now = time(NULL);

char buff[64];

strftime(buff, sizeof(buff), "%Y-%m-%d %H:%M:%S",localtime(&now) );

return buff;

}

int main()

{

string str = get_time();

cout << "get_time:" << str << endl;

string time2 = get_time2();

cout << "get_time2:" << time2 << endl;

return 0;

}