Bitwise Leftshift (<<) strange behavior

Question

gcc bitwise Leftshift (<<) strange behavior. Here is my code:

#include 
#include 

void foo(in         


        

Answer 1

Don't be surprised. you're dealing with a 32bit int, so when you do 1<<32, you've shifted that set bit right off the end of the int and zeroed out the whole thing.

e.g. in binary:

    33222222 22211111 11111000 00000000
    10987654 32109876 54321098 76543210
 1: 00000000 00000000 00000000 00000001

   ^--- position #32