Question: I. What does the #include directive do? 2. What are include guards and when should they be used? 3. We have seen how the #

I. What does the #include directive do? 2. What are include guards and when should they be used? 3. We have seen how the # define directive can be used to create compile time constants. The # define directive can also be used to create macros. #de fine P1 3.14 #de fine NUM 42 #define STR "String" #de fine MIN (a, b) ( (a
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