C++ Binary to Decimal

问题

So I know there is a way to convert Dec to binary using the bitset library but can you do the same for binary to decimal using the bitset library? or do you have to do it manually?

bitset<8> bin_x(number);

回答1:

You can, but it should be a string.

std::bitset<8> bits("1111");
std::cout << bits.to_ulong() << std::endl;

You can convert your integer to string and then pass it to bitset c-tor.

Live example

来源：https://stackoverflow.com/questions/19627521/c-binary-to-decimal