使用<<将二进制文件写入std :: fstream。算子 [英] Writing binary to std::fstream using the << operator

问题描述

由于某种原因，这种排序代码无法正常工作：

For some reason this sort code is not working as I would expect:

std::fstream theFile;
theFile.open(<someFilename>, std::ios::beg |std::ios::out|std::ios::binary|std::ios::trunc);
theFile << 1;          //1 is being written as a string
int var= 25;

theFile << 25;        //same thing, 25 is written as a string

可能是什么问题？我正在使用Visual Studio 2010附带的Microsoft C ++编译器。

What could be the problem? I am using the Microsoft C++ compiler that ships with Visual Studio 2010.

推荐答案

<< 运算符的全部目的是将格式化的数据写入流中。如果要写入二进制数据，则应使用 ostream :: write（）或 ostream :: put（）

The << operator's whole purpose is to write formatted data to a stream. If you want to write binary data, you should use ostream::write() or ostream::put().

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