std::clock_t (3) Linux Manual Page

std::clock_t – std::clock_t

Synopsis

Defined in header <ctime>

typedef /* unspecified */ clock_t;

Arithmetic type capable of representing the process running time of implementation-defined range and precision.

See also

               returns raw processor clock time since the program is started
clock (function)
               number of processor clock ticks per second
CLOCKS_PER_SEC (macro constant)