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clock

Usage


   #include <time.h>
   long clock(void)

Description

   Determines the processor time used by the calling process at the time
   clock is executed. IBM PCs have granularities of 1/18 sec. Other MS DOS
   machines have only 1 sec granularity, although the time is always
   returned in 1/100ths of a second.

   The typedef clock_t is the long data integer type that results from the
   use of clock, and represents system clock ticks.

Example 

   #include <stdio.h>
   #include <time.h>
   #include <stdlib.h>

   int main()

   {
       clock_t process;
       process = clock()/CLOCKS_PER_SEC;
       printf("Processor time in seconds %ld",process);
       return EXIT_SUCCESS;
   }

Return Value

   Returns an approximation of the processor time used thus far by the
   calling program. Division of the return value of clock by the value of
   the CLOCK_PER_SEC macro yields the time in seconds. If the processor time
   used is not available or its value cannot be represented, the function
   returns -1.

See Also

   Time package,  asctime,  ctime,  difftime,  localtime