// COMP1911 programming example
// Calculate the  the series
// 1 + 1/2 + 1/4 + 1/8 + ...
// until it converges to within 10 decimal places
//
// Andrew Taylor - andrewt@unsw.edu.au
// 22/3/2017
//

#include <stdio.h>

#define ACCURACY  0.000000000001

int main(void) {
    double sum, term;

    sum = 0;
    term = 1;

    while (term > ACCURACY) {
        sum = sum + term;
        term = term / 2.0;
    }

    printf("1 + 1/2 + 1/4 + 1/8 + ...  = %.10f\n", sum);
    return 0;
}