c++ - Bit shifting and assignment -


this question has answer here:

this sort of driving me crazy.

int = 0xffffffff; int b = 32; cout << (a << b) << "\n"; cout << (0xffffffff << 32) << "\n";

my output is

-1 0

why not getting

0 0

undefined behavior occurs when shift value number of bits not less size (e.g, 32 or more bits 32-bit integer). you've encountered example of undefined behavior.


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