C++ meaning |= and &=

Question

I have a part of code that contains the following functions:

void Keyboard(int key)
{
    switch (key) {
    case GLFW_KEY_A: m_controlState |= TDC_LEFT; bre         


        

Answer 1

it's a simple way to set & reset specific bit in a word.

bitword |= MASK is a shorthand of bitword = bitword | MASK which sets the mask bit

bitword &= ~MASK clears that bit (check your boolean algebra notebook to see why)