Thread: New to C Programming, need help with a nesting loop

In C, character constants are of type int, as you've shown.
Question 8.9

However, the char data type is sufficient for handling basic characters:

Originally Posted by C11-draft

6.2.5 Types

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3 An object declared as type char is large enough to store any member of the basic execution character set. If a member of the basic execution character set is stored in a char object, its value is guaranteed to be nonnegative. If any other character is stored in a char object, the resulting value is implementation-defined but shall be within the range of values that can be represented in that type.

But more specifically, I was taking issue with your use of numeric values in lieu of character literals. Computers may use different character sets, so 65 may not always correspond to 'A'. It is good practice to strive for portability whenever possible.