ex_atan.nxc

This is an example of how to use the atan function.

// ex_atan.nxc
// Display values of the atan API call.
// This program runs indefinitely -- press gray button to exit.
// Reguires enhanced firmware 1.28 or later.

#define BIG_NEG_VAL -1000.0
#define NEG_VAL -1.0
#define POS_VAL 1.0
#define BIG_POS_VAL 1000.0

inline void show_atan(const float val, const int screen_y)
{
   TextOut(0, screen_y, FormatNum("%7.4f RAD", atan(val)));
}

task main()
{
   show_atan(BIG_NEG_VAL, LCD_LINE1); // shows -1.5698 RAD
   show_atan(NEG_VAL, LCD_LINE2);     // shows -0.7854 RAD
   show_atan(0.0, LCD_LINE3);         // shows  0.0000 RAD
   show_atan(POS_VAL, LCD_LINE4);     // shows  0.7854 RAD
   show_atan(BIG_POS_VAL, LCD_LINE5); // shows  1.5698 RAD
   while (true);
}