ref: 94f23734015424515144b54f0a9f9d6c9d2f34c2
dir: /doc/man3/clock.3/
.TH CLOCK 3 .SH NAME clock - determine processor time .SH SYNOPSIS #include <time.h> clock_t clock(void) .SH DESCRIPTION The .BR clock () function returns an approximation of processor time used by the program. .SH RETURN VALUE The value returned is the CPU time used so far as a clock_t. In order to get the number of seconds used, divide by .BR CLOCKS_PER_SEC . If the processor time used is not available or its value cannot be represented, the function returns the value (clock_t)-1. .SH STANDARDS ISO/IEC 9899:1999 Section 7.23.2.1 Paragraph 1,2,3 .SH SEE ALSO .BR time.h (3)