2
功能strptime()
的莫名其妙的行为:为什么strptime c函数会改变结构?
#define _XOPEN_SOURCE
#include <stdio.h>
#include <time.h>
double getPeriod(char * dateStart, char * dateStop) {
struct tm tmStart, tmStop;
time_t timeStampStart, timeStampStop;
strptime(dateStart, "%Y-%m-%d %H:%M:%S", &tmStart);
strptime(dateStop, "%Y-%m-%d %H:%M:%S", &tmStop);
timeStampStart = mktime(&tmStart);
timeStampStop = mktime(&tmStop);
printf("%d\t%d\n", tmStart.tm_hour, tmStop.tm_hour);
}
int main()
{
getPeriod("2016-12-05 18:14:35", "2016-12-05 18:18:34");
return 0;
}
输出:
17 18
为什么会出现这种情况?
编译器GCC(海湾合作委员会)6.2.1 OS的Linux
您需要将timeStampStart和timeStampStop的'tm_isdst'成员初始化为-1。 – user4815162342
[似乎对GCC和工作锵这里(http://coliru.stacked-crooked.com/a/6b54f234cc33eb6c) – AndyG
@ user4815162342:哦,是夏令时的事情总是这样的痛苦!我觉得你的意思了'tmStart'和'tmStop' – AndyG