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[英]How to format time/date Strings from a time_t with unix time in C++
[英]How to change the format of date and time with time_t?
time_t now = time(0);
std::string h = std::string (ctime (&now));
std::cout << "\nh: " << h;
我收到的當前輸出是: Thu Sep 14 10:58:26 2017
我希望輸出為2017-08-26-16-10-56
我該怎么做才能輸出?
使用strftime ,如下所示:
strftime (buffer, 80,"%Y-%m-%d-%H-%M-%S",timeinfo);
完整代碼:
#include <cstdio>
#include <ctime>
int main ()
{
time_t rawtime;
struct tm * timeinfo;
char buffer [80];
time (&rawtime);
timeinfo = localtime (&rawtime);
strftime (buffer, 80,"%Y-%m-%d-%H-%M-%S",timeinfo);
puts (buffer);
return 0;
}
輸出:
2017-09-14-14-41-19
#include <iomanip>
time_t now = time(0);
std::string h = std::put_time(localtime(&now), "%F-%H-%M-%S");
std::cout << "\nh: " << h;
產量
h:2017-09-14-05-54-02
更好的是,使用std::chrono
#include <iostream>
#include <iomanip>
#include <chrono>
using namespace std;
int main() {
auto now = chrono::system_clock::to_time_t(chrono::system_clock::now());
cout << put_time(localtime(&now), "%F-%H-%M-%S") << endl;
return 0;
}
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