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Answer Posted / kesar
Macro is define by user
it locks the lot modifications....
Example:
int a[2000];
If you use lot of places 2000 in your code
some time you want to change the 2000 to 500
then you must replace 2000 with by 500. this changes are
repeatedly by u....
In this case if you define macro
Just you change the macro it will effect over all program..
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