Is string::compare reliable to determine alphabetical order?

Question

Simply put, if the input is always in the same case (here, lower case), and if the characters are always ASCII, can one use string::compare to determine reliably the alphabetica

Answer 1

The specifications for the C and C++ language guarantee for lexical ordering, 'A' < 'B' < 'C' ... < 'Z'. The same is true for lowercase.

The ordering for text digits is also guaranteed: '0' < ... < '9'.

When working with multiple languages, many people create an array of characters. The array is searched for the character. Instead of comparing characters, the indices are compared.