unsigned int a = 40;
unsigned int mask = 1<<3;
unsigned int b = a | mask;
printf ("%d", b);
I have the above code and was expecting a result of 48 for b, but I get an output of 40.
if I use a mask of 1<<2 i.e 4, I get the right value of 44.
what is wrong in my code?
Nothing is wrong with the code, it's your understanding of bit-wise or (or how many places << shifts).
1 | 1 is always 1, not 10Code:a = 101000 // aka decimal 40 m = 001000 // aka 1<<3
Perhaps you were thinking of addition, which does propagate to the next bit.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
----------Originally Posted by Salem
Thanks Salem.. i was guess i was thinking hex 40.. so dumb of me. Thanks for explaining.
