Take each character in a string and convert it to Hex c++?

Question

I am trying to take a user input as a string and convert each individual element into its hex equivalent as an unsigned char in C++. For example I want to take a user input "CL" and convert that into 0x43 and 0x4C stored in an unsigned char.

string ui;
unsinged char uihex;

cout << "Please enter in command to execute: ";
cin >> ui;
for (int i=0; i<ui.length()-1; i++)
{
    uihex = static_cast<unsigned char>(ui);
}

Answer 1

If you want to print values in hexadecimal, you will need to cast the char variable to an integer type. This will help the compiler choose the correct function for printing:

char c = 'C';
cout << "0x" << hex << ((unsigned int) c) << endl;

Answer 2

I am trying to take a user input as a string and convert each individual element into its hex equivalent as an unsigned char in C++. For example I want to take a user input "CL" and convert that into 0x43 and 0x4C stored in an unsigned char.

No conversion is required.

char KAR = 'A'; // a char from the file
int  iKAR = static_cast<int>(KAR); // cast to an int
//
std::cout << "\nltr    hex      dec" << std::endl;
std::cout << KAR << "  == "    
          << " 0x" << std::hex     // change to hex radix
          << iKAR                  // hex: KAR cast to an int
          << "  ==  " << std::dec  // change to decimal radix
          << iKAR                  // decimal: KAR cast to an int
          << std::endl;

// output:
// ltr    hex      dec
// A  ==  0x41  ==  65