C++ 比较字符串日期

C++ compare to string dates(C++ 比较字符串日期)

问题描述

我需要比较 2 个字符串日期以查看一个日期是否晚于另一个日期.两个日期的日期格式都在底部.我可以重新安排这个最简单的.我有提升，但它不一定是，我经历了这么多例子，似乎无法让我的大脑围绕让它工作.提前谢谢，基本上我想要

I need to compare 2 string dates to see if one date is later then another. The date format for both dates is at the bottom. i can rearrange this for what ever is easiest. I have boost but it doesn't have to be, ive been through so many examples and can't seem to wrap my brain around getting it to work. Thanks in advance basically i want

2012-12-06 14:28:51

2012-12-06 14:28:51

if (date1 < date2) {
 // do this
}
else {
 // do that
}  

推荐答案

看起来您使用的日期格式已经按字典顺序排列，并且可以进行标准字符串比较，例如:

It looks like the date format your using is already in lexicographical order and a standard string comparison will work, something like:

std::string date1 = "2012-12-06 14:28:51";
std::string date2 = "2012-12-06 14:28:52";
if (date1 < date2) {
    // ...
}
else {
    // ...
}

使用此格式时，您需要确保间距和标点符号一致，尤其是像 2012-12-06 9:28:51 这样的内容会破坏比较.2012-12-06 09:28:51 会起作用.

You will need to make sure that spacing and punctuation is consistent when using this format, in particular something like 2012-12-06 9:28:51 will break the comparison. 2012-12-06 09:28:51 will work though.

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