C++ boost::algorithm::hex()














































C++ boost::algorithm::hex()



Description:
The header 'boost/algorithm/hex.hpp'   contains the algorithm hex() and unhex() in C++ boost library. These functions are designed based on the MySQL function HEX and UNHEX. These functions are used for converting characters to hexadecimal values or hexadecimal to characters.

Syntax: hex():
template<typename InputIterator, typename OutputIterator>
      unspecified hex(InputIterator, InputIterator, OutputIterator); template<typename Range, typename OutputIterator>
      unspecified hex(const Range &, OutputIterator); unhex(): template<typename InputIterator, typename OutputIterator>
      OutputIterator unhex(InputIterator, InputIterator, OutputIterator); template<typename T, typename OutputIterator>
      OutputIterator unhex(const T *, OutputIterator);
    template<typename Range, typename OutputIterator>
      OutputIterator unhex(const Range &, OutputIterator);


Parameters:
The following parameters are accepted by the function:
1.) range: It is the iterator set for entire range of sequence. 2.) output iterator: It is the iterator set for copying the resultant value in hexadecimal or vice-versa.


Program:
#include <iostream>
#include <vector>
#include <boost/algorithm/hex.hpp>
using namespace std;

int main()
{
    vector<int> Arr = {168734875};
    /* Passing integer vector Arr to the hex function,
    ** this function expects an iterator to write the
    ** resultant hexadecimal value, so we attached
    ** output stream iterator to directly print the value
    */
    boost::algorithm::hex(Arr, ostream_iterator<char> {cout, ""});

    /* We passed hexadecimal value which will be interpreted as ASCII Code */
    string s = "6370702073656372657473";
    cout << endl << boost::algorithm::unhex(s);
}

Example:
Output: 0A0EB09B
               cpp secrets

Please write on comment section if you find any mistake or for any suggestions.

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