ref: a634369fb989684a8080794e9a96cf34b6ff81d6
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)