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Are (bool)(i & 1) and i % 2 == 1 always same where i is int?
Note: saying always I mean for all platforms (even when a byte is 16 bit) and for all standards of C and C++.
Edit:
For all standards of C and C++ where bool exist.
No.
1s’ complement representation of
int, the representation of -1 is1 ... 10, so they differ.Anyway,
i % 2can be negative for negativei(indeed it’s required to be in C99 when it’s not 0), and hence not equal to 1 for negative odd numbers.