Strings of unsigned chars

Question

Here\'s an interesting one. I\'m writing an AES encryption algorithm, and have managed to get it making accurate encryptions. The trouble comes when I attempt to write the r

Answer 1

Cast your value to unsigned char first:

char input = 250;                                    // just an example

unsigned int n = static_cast(input);  // NOT: "unsigned int n = input;"
//               ^^^^^^^^^^^^^^^^^^^^^^^^^^

The problem is that your char happens to be signed, and so its value is not the "byte value" that you want -- you have to convert to unsigned char to get that.