以C ++自定义日期格式 [英] Customize date format in C++

问题描述

我有这个功能：

void Log::Write(string logline){
//2011-10-12 13:07:40 correct format
    time_t rawtime;
    struct tm * timeinfo;
    time ( &rawtime );
    timeinfo = localtime ( &rawtime );
    m_stream.write( asctime (timeinfo), 24 );
    m_stream << " - " << logline << std::endl;
}

输出如下：

Thu Oct 13 12:35:30 2011

Thu Oct 13 12:35:30 2011

但是我想看到输出像评论部分：

but I wanna see the output like the comment section:

2011-10-12 13:07:40

2011-10-12 13:07:40

如何可能？

推荐答案

这是非常可能的。看看 strftime（）的联机帮助页。在这种情况下，您需要：

It's very possible. Look at the manpage for strftime(). In this case, you'd want:

void Log::Write(string line) 
{
    time_t rawtime;
    struct tm * timeinfo;
    char buffer [80];

    time ( &rawtime );
    timeinfo = localtime ( &rawtime );

    strftime (buffer,80,"%Y-%m-%d %H:%M:%S",timeinfo);
    m_stream << buffer << " - " << line << endl;
}

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