C++语言下的int2hex()和hex2int()

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#pragma once

#include <iostream>

#include <iomanip> //std::hex, std::setw, std::setfill



template <class T>T hex2int(string hexstr);

template <class T>string int2hex(T val, int size);



template <class T>

T hex2int(string hexstr) {

        istringstream intstream(hexstr);

        T val;

        intstream >> hex >> val;

        return val;

}



template <class T>

string int2hex(T val, int size) {

        ostringstream hexstream;

        hexstream << hex << setw(size) << setfill('0') << setiosflags(ios::uppercase) << val;

        return hexstream.str();

}