C++, How to convert a number from Char to Int

convertCharToInt.cpp

#include <iostream>
using namespace;

int main()
{
  char charSix = '6'; 
  // int intSix = int( charSix ) - 48;  // DON'T DO THIS, Leverington calls this 'terrible code'
  int intSix = int( charSix - '0');
  
  cout << "The value of intSix is: " << intSix << endl;

  return 0;
}