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What Is The Concatenation Operator? |
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Answer» The Concatenation operator (##) in macro is used to concatenate two arguments. Literally, we can say that the arguments are concatenated, but ACTUALLY their value are not concatenated. Think it this way, if we PASS A and B to a macro which uses ## to concatenate those two, then the result will be AB. Consider the example to clear the confusion- #define SOME_MACRO(a, b) a##b MAIN() { int VAR = 15; printf(“%d”, SOME_MACRO(v, AR)); } Output of the above program will be 15. The Concatenation operator (##) in macro is used to concatenate two arguments. Literally, we can say that the arguments are concatenated, but actually their value are not concatenated. Think it this way, if we pass A and B to a macro which uses ## to concatenate those two, then the result will be AB. Consider the example to clear the confusion- #define SOME_MACRO(a, b) a##b main() { int var = 15; printf(“%d”, SOME_MACRO(v, ar)); } Output of the above program will be 15. |
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