clock : cumulative processor time
Synopsis
Section titled “Synopsis”#include <time.h>clock_t clock(void);```### Description
Calculates the best available approximation of the cumulative amount of time used by your program since it started. To convert the result into seconds, divide by the macro CLOCKS_PER_SEC.### Returns
The amount of processor time used so far by your program, in units defined by the machine-dependent macro CLOCKS_PER_SEC. If no measurement is available, the result is -1.
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**Authoritative source**: BUSMASTER DITA help source `clock.dita`, compiled into `BUSMASTER.CHM` with the application.