从文件中无符号的字符数组读取文本 [英] Reading text from file to unsigned char array

问题描述

我一直在寻找使用OpenSSL在要加密的文件文本，将需要的文字是在一个无符号的字符数组之前，我对它进行加密。什么是最简单的方法从文件中读取文本为unsigned char数组？

I was looking to use OpenSSL to encrypt text in a file, and will need the text to be in an unsigned char array before I encrypt it. What is the easiest way read text from a file to an unsigned char array?

推荐答案

您的问题被标记C和C ++ <子>（这不是建设性的）。我会给C ++的一个答案。

Your question is tagged both C and C++ _{(which isn't constructive)}. I will give an answer for C++.

#include <fstream>
#include <iterator>
#include <vector>

using namespace std;

int main()
{
    ifstream in("filename.txt"); //open file
    in >> noskipws;  //we don't want to skip spaces        
    //initialize a vector with a pair of istream_iterators
    vector<unsigned char> v((istream_iterator<unsigned char>(in)), 
                            (istream_iterator<unsigned char>()));
    ...
}

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