20 lines
410 B
C
20 lines
410 B
C
#include <stdio.h>
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#include <sys/time.h>
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int main(int argc, char**argv) {
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unsigned long i, n, acc=0;
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struct timeval start, end;
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sscanf(argv[1], "%lu", &n);
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gettimeofday(&start, NULL);
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for (i = 0; i <= n; i++) {
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acc = acc + i;
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}
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gettimeofday(&end, NULL);
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printf("%lu (%f milliseconds)\n",
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acc,
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(1000.0*(end.tv_sec - start.tv_sec) +
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((end.tv_usec - start.tv_usec) / 1000.0) ));
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}
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