How to convert Byte Array to hex string in visual c++?

Question

Declaration of a method are following:

//some.h
void TDES_Decryption(BYTE *Data, BYTE *Key, BYTE *InitalVector, int Length);

I am calling t

Answer 1

Here is a somewhat more flexible version (Use uppercase characters? Insert spaces between bytes?) that can be used with plain arrays and various standard containers:

#include 
#include 
#include 

template
std::string make_hex_string(TInputIter first, TInputIter last, bool use_uppercase = true, bool insert_spaces = false)
{
    std::ostringstream ss;
    ss << std::hex << std::setfill('0');
    if (use_uppercase)
        ss << std::uppercase;
    while (first != last)
    {
        ss << std::setw(2) << static_cast(*first++);
        if (insert_spaces && first != last)
            ss << " ";
    }
    return ss.str();
}

Example usage (plain array):

uint8_t byte_array[] = { 0xDE, 0xAD, 0xC0, 0xDE, 0x00, 0xFF };
auto from_array = make_hex_string(std::begin(byte_array), std::end(byte_array), true, true);
assert(from_array == "DE AD C0 DE 00 FF");

Example usage (std::vector):

// fill with values from the array above
std::vector byte_vector(std::begin(byte_array), std::end(byte_array));
auto from_vector = make_hex_string(byte_vector.begin(), byte_vector.end(), false);
assert(from_vector == "deadc0de00ff");