将字符串写入文件的末尾（C ++） [英] Writting a string to the end of a file (C++)

问题描述

所以我有一个程序已经形成了一个字符串，我想流到一个现有的文本文件的末尾。所有我所拥有的是这样的：（C ++）

pre $ $ $ $ $ $ $
$ :: string str =我在这里;
fileOUT<<海峡;

我知道还有很多东西要添加到这里，似乎我在问人们为我编码，但我完全失去了，因为我以前从来没有做过这种类型的编程。

我尝试了不同的方法，我已经来了通过互联网，但这是最接近的作品，是有点熟悉。

解决方案使用<$ c $打开您的文件c> std :: ios :: app

  #include< fstream> 
 
 std :: ofstream out; 
 
 // std :: ios :: app是开放模式append，意思是
 //新的数据将被写入文件的末尾。 
 out.open（myfile.txt，std :: ios :: app）; 
 
 std :: string str =我在这里。 
 out<<海峡; 
  

So I have a program already formed that has a string that I want to stream to the end of an existing text file. All of what little I have is this: (C++)

 void main()
{
   std::string str = "I am here";
   fileOUT << str;
}

I realize there is much to be added to this and I do apologize if it seems I am asking people to code for me, but I am completely lost because I have never done this type of programming before.

I have attempted different methods that I have come across the internet, but this is the closest thing that works and is somewhat familiar.

解决方案

Open your file using std::ios::app

 #include <fstream>

 std::ofstream out;

 // std::ios::app is the open mode "append" meaning
 // new data will be written to the end of the file.
 out.open("myfile.txt", std::ios::app);

 std::string str = "I am here.";
 out << str;

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