Hexadecimal

I'm a beginner and new here. Help can't understand this question.
a program to read 2 characters, and print their value when interpreted as a 2 digit hexadecimal number. Accept upper case letter for value from 10 to 15.
thanks

Are you coding in C or C++?

Do you know what a char is?

Do you know how to read from standard input (i.e. the keyboard)?

Do you know how to print to standard output (i.e. the monitor)?

I suggest you accept two characters and test each one to be a hex digit. If both are, you should be able to convert each character to hex and then add it to your result taking to account the position of the hex character. If you receive:

A6

that is

A * 16 + 6 * 1

Shouldn't be too hard.