Change a bit of an integer [duplicate]

Answer 1

You can always use std::bitset which makes modifying bits easy.

Or you can use bit manipulations (assuming you mean 4th bit counting at one. Don't subtract 1 if you mean counting from 0). Note that I use 1U just to guarantee that the whole operation happens on unsigned numbers:

To set: x |= (1U << (4 - 1));

To clear: x &= ~(1U << (4 - 1));

To toggle: x ^= (1U << (4 - 1));