Macros: Arithmetic Mean, Absolute Value, Biggest of 3 number and upper case to lower case: C Program

https://technotip.com/8717/using-macros-find-arithmetic-mean-absolute-value-biggest-of-3-number-and-convert-upper-case-alphabet-to-lower-case-c-program/

Problem Statement:

Write down macro definitions for the following:

1. To find arithmetic mean of two numbers.
2. To find absolute value of a number.
3. To convert an upper case alphabet to lower case.
4. To obtain the biggest of three numbers.

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