C++ String Functions

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String functions in C++. So far, we've gone over how to access, append, remove, and update characters within a string. Outside of these methods, we can utilize the built-in cctype library in C++ to classify and transform characters within a string. Specifically, we will be using the tolower and toupper functions to convert a character to lowercase or uppercase. We will use this to create a program that checks an input username that is case insensitive. In addition, we will use the islower, isupper, isdigit, isalnum functions to create a program for verifying whether or not a password meets character requirements.

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List of string character functions in the ctype library:

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