9일 차 복소수에 관하여

class Add {

private int num;

private int num2;

private static int add;

public int getNum() {

return num;

}

public void setNum(int num) {

this.num = num;

}

public int getNum2() {

return num2;

}

public void setNum2(int num2) {

this.num2 = num2;

}

public static int getAdd() {

return add;

}

public static void setAdd(int add) {

Add.add = add;

}

@Override

public String toString() {

return "Add [num=" + num + ", num2=" + num2 + "]";

}

public Add() {

this.num = 5;

this.num2 = 2;

}

public Add(int i, int j) {

this.num = i;

this.num2 = j;

}

public static Add add(Add cpp, Add cpp2, String val) {

int resultnum = 0;

int resultnum2 = 0;

if ("+".equals(val)) {

resultnum = cpp.num + cpp2.getNum();

resultnum2 = cpp.num2 + cpp2.getNum2();

} else if ("-".equals(val)) {

resultnum = cpp.num - cpp2.getNum();

resultnum2 = cpp.num2 - cpp2.getNum2();

} else if ("*".equals(val)) {

resultnum = cpp.num * cpp2.getNum();

resultnum2 = cpp.num2 * cpp2.getNum2();

} else if ("/".equals(val)) {

resultnum = cpp.num / cpp2.getNum();

resultnum2 = cpp.num2 / cpp2.getNum2();

}

return new Add(resultnum, resultnum2);

}

}

import java.util.Scanner;

public class Test4 {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner scan = new Scanner(System.in);

String val = null;

int input_num = 0, input_num2 = 0;

System.out.println("+,-,*,/ 중 하나를 입력하세요");

val = scan.nextLine();

System.out.println("5,2와 연산을 할 숫자를 두개 입력하세요");

input_num = scan.nextInt();

input_num2 = scan.nextInt();

Add ad = new Add();

Add ad2 = new Add(input_num, input_num2);

Add ad3 = Add.add(ad, ad2, val);

switch (val) {

case "+":

System.out.println(ad3);

break;

case "-":

System.out.println(ad3);

break;

case "*":

System.out.println(ad3);

break;

case "/":

System.out.println(ad3);

break;

default:

System.out.println("잘못된 입력입니다");

break;

}

}

}

static add가  public일 때에는 타클래스에서 접근이 가능하기 때문에

이렇게 할 수 있다

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class Add2 {

private int num;

private int num2;

private static int add;

static int resultnum = 0;

static int resultnum2 = 0;

public int getNum() {

return num;

}

public void setNum(int num) {

this.num = num;

}

public int getNum2() {

return num2;

}

public void setNum2(int num2) {

this.num2 = num2;

}

public static int getAdd() {

return add;

}

public static void setAdd(int add) {

Add2.add = add;

}

@Override

public String toString() {

return "Add [num=" + num + ", num2=" + num2 + "]";

}

public Add2() {

this.num = 5;

this.num2 = 2;

}

public Add2(int i, int j) {

this.num = i;

this.num2 = j;

}

private static Add2 add(Add2 cpp, Add2 cpp2, String val) {

resultnum = 0;

resultnum2 = 0;

if ("+".equals(val)) {

resultnum = cpp.num + cpp2.getNum();

resultnum2 = cpp.num2 + cpp2.getNum2();

} else if ("-".equals(val)) {

resultnum = cpp.num - cpp2.getNum();

resultnum2 = cpp.num2 - cpp2.getNum2();

} else if ("*".equals(val)) {

resultnum = cpp.num * cpp2.getNum();

resultnum2 = cpp.num2 * cpp2.getNum2();

} else if ("/".equals(val)) {

resultnum = cpp.num / cpp2.getNum();

resultnum2 = cpp.num2 / cpp2.getNum2();

}

return new Add2(resultnum, resultnum2);

}

public Add2 getsetgiAd2(Add2 cpp, Add2 cpp2, String val) {

return Add2.add(cpp, cpp2, val);

}

}

import java.util.Scanner;

public class Test5 {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner scan = new Scanner(System.in);

String val = null;

int input_num = 0, input_num2 = 0;

System.out.println("+,-,*,/ 중 하나를 입력하세요");

val = scan.nextLine();

System.out.println("5,2와 연산을 할 숫자를 두개 입력하세요");

input_num = scan.nextInt();

input_num2 = scan.nextInt();

Add2 ad = new Add2();

Add2 ad2 = new Add2(input_num, input_num2);

Add2 ad3=new Add2();

ad3=ad2.getsetgiAd2(ad, ad2, val);

switch (val) {

case "+":

System.out.println(ad3);

break;

case "-":

System.out.println(ad3);

break;

case "*":

System.out.println(ad3);

break;

case "/":

System.out.println(ad3);

break;

default:

System.out.println("잘못된 입력입니다");

break;

}

}

}

static add가  private일 때에는 타클래스에서 접근이 불가능하기 때문에

getter에서 리턴값을 반환 후에 접근을 해야한다