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捕获一只野生阿皮

#1 Created at ... [Delete] [Delete and Lock User] 
public class piTest {    public static class Main {        public static void main(String[] args) {            double pi = 0;            double a = 1;            for (int i=1;i<Integer.MAX_VALUE;i=i+2) {                pi+= a * (1.0/i); //int转换成double属于从小变大 ，不需要强转                a = -a;            }            pi= pi * 4;            System.out.println(pi);        }    }}

捕获一只野生阿皮

#2 Created at ... [Delete] [Delete and Lock User] 
public class piTest {    public static class Main {        public static void main(String[] args) {            double pi = 0;            double a = 1;            for (int i=1;i<Integer.MAX_VALUE;i=i+2) {                pi+= a * (1.0/i); //int转换成double属于从小变大 ，不需要强转                a = -a;            }            pi= pi * 4;            System.out.println(pi);        }    }}

捕获一只野生阿皮

#3 Created at ... [Delete] [Delete and Lock User] 
public class piTest {    public static class Main {        public static void main(String[] args) {            double pi = 0;            double a = 1;            for (int i=1;i<Integer.MAX_VALUE;i=i+2) {                pi+= a * (1.0/i); //int转换成double属于从小变大 ，不需要强转                a = -a;            }            pi= pi * 4;            System.out.println(pi);        }    }}

捕获一只野生阿皮

#4 Created at ... [Delete] [Delete and Lock User]

public class piTest {

    public static class Main {

        public static void main(String[] args) {

            double pi = 0;

            double a = 1;

            for (int i=1;i<Integer.MAX_VALUE;i=i+2) {

                pi+= a * (1.0/i); //int转换成double属于从小变大 ，不需要强转

                a = -a;

            }

            pi= pi * 4;

            System.out.println(pi);

        }

    }

}

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