Returns 1 if the computer is on. If the computer isn't on, the value returned by this function is undefined.
Returns the temperature of the motherboard if the computer is currently on fire. If the computer isn't on fire, the function returns some other value.
printf("[%d] = is_computer_on()\n", is_computer_on());
printf("[%f] = is_computer_on_fire()\n", is_computer_on_fire());