bit_manipulation.c

// Sets the bit at pos to 1 if 0, else keeps unchanges
void set_bit(int *bits, int pos) {
  (*bits) |= (1 << pos);
}

// Clears the bit at pos to 0 if 1, else keeps unchanged
void clear_bit(int *bits, int pos) {
  (*bits) &= ~(1 << pos);
}

// Returns the bit at pos
int check_bit(int *bits, int pos) {
  bit = (*bits) & (1 << pos);
  return bit;
}

// Toggles the bit at pos
void toggle_bit(int *bits, int pos) {
  (*bits) ^= (1 << pos);
}