#include <stdio.h>


int main()
{
double pi = 0.0, termo, p0, erro;
int signal = 1, i = 1;

   do {
       termo = signal * (4.0 / (2 * i - 1));
       p0 = pi;
       pi += termo;
       erro = (pi - p0) * signal;
       signal *= -1;
       printf("Erro: %lf\n", erro);
       i++;
   } while (erro >= 0.00001 );
   printf("Valor computado: %lf", pi);
}