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Clock

Item Value Header filetime.h Declarationclock_t clock(void); Returnreturns time or -1 if the time is not available. To transform this value into seconds, divide it by CLOCKS_PER_SEC. #include <time.h>   #include <stdio.h>   int main(void)   {         printf("Elapsed time: %u secs.\n", clock()/CLOCKS_PER_SEC);       } Elapsed time: 0 secs.