drugi_kolokvijum_b_pi

#include <stdio.h>

#define TACNOST 0.001

int main (int argc, char** argv) {
    int n=1;
    double pi=2.0;
    int potrebnaTacnost = 0;
    while (potrebnaTacnost == 0) {
        n+=2;
        pi *= (double)(n-1)/n;
        pi *= (double)(n+1)/n;
        if ((1- (double)(n-1)/n) < TACNOST ) potrebnaTacnost=1;
    }
    pi *= 2;
    printf("pi = %.3lf", pi);
    getchar();
    getchar();
    return 0;
}