clock.3 (575B)
1 .TH CLOCK 3 2 .SH NAME 3 clock - query processor time used by the program 4 .SH SYNOPSIS 5 #include <time.h> 6 7 clock_t clock(void) 8 .SH DESCRIPTION 9 The 10 .BR clock () 11 function returns an approximation of the processor time 12 consumed by the running program. 13 .SH RETURN VALUE 14 The accumulated processor time is returned as a 15 .IR clock_t . 16 Dividing the result by 17 .B CLOCKS_PER_SEC 18 gives the time in seconds. 19 If the processor time is unavailable or cannot be represented, 20 .B (clock_t)-1 21 is returned. 22 .SH STANDARDS 23 ISO/IEC 9899:1999 Section 7.23.2.1 Paragraph 1,2,3 24 .SH SEE ALSO 25 .BR time.h (3)