c++ - shortest way to check if a positive integer is a power of two -

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use template write c++ function checks if positive integer power of two.

bool p(int n) {     return ********; }

you have replace 8 '*' symbols other symbols in order make function work correctly.
best approach this:

bool p(int n) {     return !(n&=n-1); }

unfortunately wrong, because there 9 symbols here...
ideas?

why assign n? remove = , have 1 character less. create temporary instead, logic won't change.

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