I´m making a program to change all of the caracters and numbers from any text file. But I need to verificate if the caracter that it´s going to change is a valid caracter before doing the changing.
Example of Valid Caraters and Numbers:
Letters from A to Z
Numbers 1 to 10
Also the letters that are valid in my country like: Ç É â ã ú, etc..
Example of Invalid Caracter:
œƒ‹ßŠÐ€Ï ŠØ¹üÿ and more.
Is there a way to verify ?