Bitwise operations: C vs. Python -

i'm faced weird problem here. consider piece of code:

#include <stdio.h>     int main()     {         printf("%u\n", (55 & 00000111) + 1);         return 0;     } 

this code, upon being compiled , executed, yields 2 result.

python, on other hand, yields this:

>>> (55 & 0b00000111) + 1 8 

why different results?

c doesn't have literal binary. 00000111 not binary literal assumed. instead interpreted octal 111 (or decimal 73) 0 prefix denotes octal in c. in case of python 0b00000111 proper binary literal (note b after 0 prefix). that's why getting different results in c , python.

in case want use binary literal in c code, in opinion best way use hexadecimal literal starting 0x since 1 hex digit equivalent 4 binary digits , it's easy convert hex literal binary literal , vice versa. example, have used 0x7 in example.

printf("%u\n", (55 & 0x7) + 1);