Sidetrack: C Style
We can define a symbolic constant at the top of the file
#define SPEED_OF_LIGHT 299792458.0
#define ERROR_MESSAGE "Out of memory.\n"
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Symbolic constants make the code easier to understand and maintain
#define NAME replacement_text
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- The compiler's pre-processor will replace all occurrences of
NAME with replacement_text
- it will not make the replacement if
NAME is inside quotes ("…") or part of another name
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