C语言训练-求PI* （Java代码）额，注意10-6表示就好了

参考代码:

public class Main1134 {

public static void main(String[] args) {

double PI = 1;

double i = 1;

int a = 0;

while (1 / (Math.abs(i) + 2) >= 1e-6) {

if (a == 0) {

i = (i + 2) * -1;

PI = PI + 1 / i;

a = 1;

continue;

}

if (a == 1) {

i = (i - 2) * -1;

PI = PI + 1 / i;

a = 0;

continue;

}

}

System.out.println(String.format("%.6f", 4 * PI));

}

}