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What is "##" preprocessor directive used for or how does it work?
3 Respostas
+ 4
thnku ma'amš
@vaishnavi
+ 3
ā##ā preprocessing operator performs token pasting. When a macro is expanded, the two tokens on either side of each ā##ā operator are combined into a single token, which then replaces the ā##ā and the two original tokens in the macro expansion. Usually both will be identifiers, or one will be an identifier and the other a preprocessing number. When pasted, they make a longer identifier. This isnāt the only valid case. It is also possible to concatenate two numbers (or a number and a name, such asĀ 1.5Ā andĀ e3) into a number. Also, multi-character operators such asĀ +=Ā can be formed by token pasting.
+ 2
thanx for your regards sir!