nanf
extern float nanf(const char *tagp);
float temperature = std::nanf("");
float brightness = std::nanf("0");
float brightnessToPrint = std::nanf("0");
__real__ res = nanf ("");
__real__ res = nanf ("");
__imag__ res = nanf ("");
__imag__ res = nanf ("");
__imag__ res = nanf ("");
__real__ res = nanf ("");
__imag__ res = nanf ("");
__real__ retval = nanf ("");
__imag__ retval = nanf ("");
__real__ retval = nanf ("");
__imag__ retval = nanf ("");
__imag__ retval = nanf ("");
__imag__ result = nanf ("");
__real__ result = nanf ("");
__imag__ result = nanf ("");
__real__ result = nanf ("");