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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_100
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161_01
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harness4.c
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C/C++ Source or Header
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1985-08-28
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763b
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31 lines
#include <stdio.h>
#include "cputim.h"
#define LOOPCNT 100000
main()
{
double time0, timediv, timeadd;
long a, b = 255, c = 255, i;
cputim(); /* time the timing harness */
for (i = 1; i <= LOOPCNT; ++i)
a = b;
time0 = cputim() * (1e6 / CLOCK_TICKS_PER_SECOND);
cputim(); /* time the divide operator */
for (i = 1; i <= LOOPCNT; ++i)
a = b / c;
timediv = cputim() * (1e6 / CLOCK_TICKS_PER_SECOND);
cputim(); /* time the addition operator */
for (i = 1; i <= LOOPCNT; ++i)
a = b + c;
timeadd = cputim() * (1e6 / CLOCK_TICKS_PER_SECOND);
printf("long divides require %.1f microseconds \n",
(timediv - time0)/LOOPCNT);
printf("long additions require %.1f microseconds \n",
(timeadd - time0)/LOOPCNT);
}