[英]Convert time_t to string and string to time_t gives wrong year and an hour
我正在尝试编写函数来帮助自己轻松地将string
转换为time_t
并将time_t
转换为string
。 但是,它总是给我错误的一年零一个小时。 怎么了?
我需要它独立于操作系统!
例如,对于日期30/11/2012:09:49:55
它给出的是30/11/3912:08:49:55
而不是30/11/2012:09:49:55
。
#include <iostream>
#include <string.h>
#include <cstdio>
using namespace std;
time_t string_to_time_t(string s)
{
int yy, mm, dd, hour, min, sec;
struct tm when;
long tme;
memset(&when, 0, sizeof(struct tm));
sscanf(s.c_str(), "%d/%d/%d:%d:%d:%d", &dd, &mm, &yy, &hour, &min, &sec);
time(&tme);
when = *localtime(&tme);
when.tm_year = yy;
when.tm_mon = mm-1;
when.tm_mday = dd;
when.tm_hour = hour;
when.tm_min = min;
when.tm_sec = sec;
return mktime(&when);
}
string time_t_to_string(time_t t)
{
char buff[20];
strftime(buff, 20, "%d/%m/%Y:%H:%M:%S", localtime(&t));
string s(buff);
return s;
}
int main()
{
string s = "30/11/2012:13:49:55";
time_t t = string_to_time_t(s);
string ss = time_t_to_string(t);
cout << ss << "\n";
return 0;
}
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