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33 lines
698 B
C
33 lines
698 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <math.h>
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int main(int argc, char *argv[]) {
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if(argc != 2) {
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fprintf(stderr, "Uso: %s <tiros>\n", argv[0]);
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return 1;
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}
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srand(time(NULL));
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long tiros = atol(argv[1]);
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long positivos = 0;
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for(long i = 0; i < tiros; i++) {
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double x = (double)rand() / RAND_MAX;
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double y = (double)rand() / RAND_MAX;
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if(x * x + y * y < 1)
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positivos++;
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}
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double pi = 4.0 * positivos / tiros;
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printf("Tiros = %ld, Positivos = %ld\n", tiros, positivos);
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printf("π ~= %.15f\n", pi);
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printf("ε = %f%%\n", 100 * fabs(M_PI - pi) / M_PI);
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return 0;
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}
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