Question

I am programming with objective c and I want to get character’s alphabetical order. For example:
A, a – 1,
B, b – 2,
…
Z, z – 26

Is there a function in Objective C that enables me to achieve this goal?

Thank you in advance,
Ilya.

Answer 1

Well if you can guarantee that the character set is ASCII, then you can just subtract the char from ‘A’ and then add 1 (only add one if you want to start counting at 1 instead of 0).

Ex:

char ch = 'E';
int num = toupper(ch) - 'A' + 1; // to upper since 'A' and 'a' are not the same character.
// num now is 5