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#include <stdio.h> #include <time.h> main () { volatile int i; double t1, t2, t; t1 = (double) clock (); for (i = 0; i < 100000; ++i) ; t2 = (double) clock (); t = (t2 - t1) / ((double) CLOCKS_PER_SEC); printf ("%f - %f = %f\n",t2,t1,t); return 0; }