#include <iostream>
#include <string>
using namespace std;

inline unsigned int to_uint(char ch)
{
    return static_cast<unsigned int>(static_cast<unsigned char>(ch));
}

int main()
{
    string data{"Hello"};

    cout << hex;
    for (char ch : data)
    {
        cout << "0x" << to_uint(ch) << ' '; 
    }
}