C++ string encoding 1

main.cpp

#include <iostream>
#include <cstring>

using namespace std;

void print_bytes(unsigned char* ptr, unsigned char* end)
{
    while(ptr != end)
    {
        printf("%x, %02x\n", ptr, *ptr);
        ++ptr;
    }
}

int main(){
    string literal_to_str = "\U00029E3D"s;
    wstring wide_literal_to_wstr= L"\U00029E3D"s;
    string u8literal_to_str = u8"\U00029E3D"s;
    u16string u16literal_to_u16string = u"\U00029E3D"s;
    u32string u32literal_to_u32string = U"\U00029E3D"s;

    cout << "=== literal_to_str ===" << endl;
    cout << "Size: " << literal_to_str.size() << endl;
    print_bytes((unsigned char*)literal_to_str.data(), (unsigned char*)(literal_to_str.data() + literal_to_str.size()));

    cout << "=== wide_literal_to_wstr ===" << endl;
    cout << "Size: " << wide_literal_to_wstr.size() << endl;
    print_bytes((unsigned char*)wide_literal_to_wstr.data(),(unsigned char*)&*(wide_literal_to_wstr.begin() + wide_literal_to_wstr.size()));

    cout << "=== u16literal_to_u16string ===" << endl;
    cout << "Size: " << u16literal_to_u16string.size() << endl;
    print_bytes((unsigned char*)u16literal_to_u16string.data(), (unsigned char*)(u16literal_to_u16string.data() + u16literal_to_u16string.size()));

    cout << "=== u32literal_to_u32string ===" << endl;
    cout << "Size: " << u32literal_to_u32string.size() << endl;
    print_bytes((unsigned char*)u32literal_to_u32string.data(), (unsigned char*)(u32literal_to_u32string.data() + u32literal_to_u32string.size()));
}