如何用C ++编写日志文件

问题描述

限时删除！！

Hello all Programmer，



任何人都可以帮我用c ++编写日志文件或者为我提供指针或代码片段。



谢谢

Sampath

Hello all Programmer,

Can anybody help me to write log file in c++ or provide me the pointer or some code snippet for same.

thanks
Sampath

推荐答案

#include <fstream>

void write_text_to_log_file( const std::string &text )
{
    std::ofstream log_file(
        "log_file.txt", std::ios_base::out | std::ios_base::app );
    log_file << text << std::end;
}

如果文件由于某种原因无法打开，奖金也是如此在一堆未定义的行为中崩溃。



干杯，



Ash



PS当你自己写的时候记录的重要部分是：



- 每条消息后刷新 - std： ：endl这样做



- 在每条消息后关闭文件 - fstream析构函数执行该操作

It'll do the same thing with the bonus that if the file fails to open for whatever reason it won't crash in a steaming heap of undefined behaviour.

Cheers,

Ash

PS the important bits of logging for when you write your own are:

- flush after every message - std::endl does that

- close the file after every message - the fstream destructor does that

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