Lookup the isalpha() function in the C standard library, this function will check and return non-zero for alphabetic characters.
Answer: Without GUI's being developed, we most likely would still be using terminal systems. Terminals require command/text input rather than mouse or other input. The invention of GUI's enabled people to use simpler input methods, rather then clunky text input systems. To sum, GUI's simplified the computer experience as we know today.
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Answer: To enter the Advanced Server, please follow the below instructions: Tap into the Profile section and click Account Settings. Tap on the Switch Server button on the bottom right of the screen. This will allow the player to switch between the Original Server and Advanced Server.
Explanation: I play Mobile legends a lot so I know this
I believe the answer is C.
