Issues a beep from the terminalvoid sm_bel(void);
sm_belcauses the terminal to beep, usually by transmitting the ASCII
BELcode to it. If there is a
BELLentry in the video file,
sm_beltransmits that instead. This usually causes the terminal to flash.
Even if there is no
BELLentry, use this function instead of sending a
BEL, because certain displays use
BELas a graphics character.
This function is automatically called when message text begins with
/* Beep if cost is too high. */
if (sm_n_dblval("cost") > 1000.00)