convert bitset to int in c++

问题

In c++. I initialize a bitset to -3 like:

std::bitset<32> mybit(-3);

Is there a grace way that convert mybit to -3. Beacause bitset object only have methods like to_ulong and to_string.

回答1:

Use to_ulong to convert it to unsigned long, then an ordinary cast to convert it to int.

int mybit_int;

mybit_int = (int)(mybit.to_ulong());

DEMO

来源：https://stackoverflow.com/questions/19583720/convert-bitset-to-int-in-c