Category "alphanumeric"

I have to put an alphanumeric password in a text file

Here's the code: #include <iostream> #include <fstream> #include <string> #include <cstdlib> #include <ctime> #include <windows

How to check if a string is alphanumeric?

I can use occursin function, but its haystack argument cannot be a regular expression, which means I have to pass the entire alphanumeric string to it. Is there