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class Bunsu1

bun1. a. b. bunshi. bunbo. class Bunsu1. class Bunsu { private int bunshi; private int bunbo;. public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+");

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class Bunsu1

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  1. bun1 a b bunshi bunbo class Bunsu1 class Bunsu { private int bunshi; private int bunbo; public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } 2 1 Bunsu bun1 = new Bunsu(1,2); Bunsu(int a, int b) { //コンストラクタ void print() { //分数を表示 Bunsu plus(Bunsu other) { //足し算 コピー Bunsu オブジェクト Bunsu(int a, int b) { void print() { Bunsu plus(Bunsu other) { Bunsu(int a, int b) { if(b < 0) { …} bunshi = a; bunbo = b; }

  2. bun1 a 1 b 2 bunbo bunshi class Bunsu1 class Bunsu { private int bunshi; private int bunbo; public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } Bunsu bun1 = new Bunsu(1,2); Bunsu(int a, int b) { //コンストラクタ void print() { //分数を表示 Bunsu plus(Bunsu other) { //足し算 Bunsu オブジェクト void print() { Bunsu plus(Bunsu other) { Bunsu(int a, int b) { if(b < 0) { …} bunshi = a; bunbo = b; } 1 bunshi = a;

  3. bun1 a 1 b 2 bunbo bunshi 1 class Bunsu1 class Bunsu { private int bunshi; private int bunbo; public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } Bunsu bun1 = new Bunsu(1,2); Bunsu(int a, int b) { //コンストラクタ void print() { //分数を表示 Bunsu plus(Bunsu other) { //足し算 Bunsu オブジェクト void print() { Bunsu plus(Bunsu other) { Bunsu(int a, int b) { if(b < 0) { …} bunshi = a; bunbo = b; } 2 bunbo = b;

  4. bun1 a 1 b 2 bunshi bunbo 2 1 class Bunsu1 class Bunsu { private int bunshi; private int bunbo; public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } Bunsu bun1 = new Bunsu(1,2); Bunsu(int a, int b) { //コンストラクタ void print() { //分数を表示 Bunsu plus(Bunsu other) { //足し算 Bunsu オブジェクト void print() { Bunsu plus(Bunsu other) { Bunsu(int a, int b) { if(b < 0) { …} bunshi = a; bunbo = b; }

  5. bun1 bun2 bunbo bunshi bunbo bunshi 1 3 1 2 class Bunsu1 class Bunsu { private int bunshi; private int bunbo; Bunsu(int a, int b) public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } void print() { Bunsu bun2 = new Bunsu(1,3); Bunsu plus(Bunsu other) Bunsu オブジェクト Bunsu(int a, int b) void print() { Bunsu plus(Bunsu other) Bunsu オブジェクト Bunsu(int a, int b) void print() { Bunsu plus(Bunsu other)

  6. bun2 bun1 other wa bunbo bunshi bunshi bunbo 3 1 2 1 class Bunsu1 class Bunsu { private int bunshi; private int bunbo; Bunsu(int a, int b) public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } void print() { Bunsu plus(Bunsu other) Bunsu wa = bun1.plus(bun2); Bunsu オブジェクト Bunsu(int a, int b) void print() { Bunsu plus(Bunsu other) Bunsu plus(Bunsu other) { int newBunshi = this.bunshi*other.bunbo + ... int newBunbo = this.bunbo*other.bunbo; Bunsu p = new Bunsu(newBunshi,… return p; } Bunsu オブジェクト Bunsu(int a, int b) void print() { Bunsu plus(Bunsu other)

  7. this bun2 bun1 other wa newBunshi bunshi bunbo bunshi bunbo 1 2 1 3 class Bunsu { private int bunshi; private int bunbo; Bunsu(int a, int b) class Bunsu1 void print() { Bunsu plus(Bunsu other) Bunsu オブジェクト 1 2 Bunsu plus(Bunsu other) { int newBunshi = this.bunshi*other.bunbo + other.bunshi+this.bunbo; int newBunbo = this.bunbo*other.bunbo; Bunsu p = new Bunsu(newBunshi,newBunbo); return p; } int newBunshi = 1 × 3 = 3 this.bunshi * other.bunbo + 1 × 2 = 2 other.bunshi * this.bunbo; 3 + 2 = 5 5 Bunsu オブジェクト 1 3

  8. this other bun1 bun2 wa newBunbo newBunshi 5 bunbo bunshi bunshi bunbo 1 1 3 2 class Bunsu { private int bunshi; private int bunbo; Bunsu(int a, int b) class Bunsu1 void print() { Bunsu plus(Bunsu other) Bunsu オブジェクト 2 Bunsu plus(Bunsu other) { int newBunshi = this.bunshi*other.bunbo + other.bunshi+this.bunbo; int newBunbo = this.bunbo*other.bunbo; Bunsu p = new Bunsu(newBunshi,newBunbo); return p; } 2 × 3 = 6 int newBunbo = this.bunbo * other.bunbo; 6 Bunsu オブジェクト 3

  9. this bun2 other bun1 wa newBunshi newBunbo p 5 6 bunshi bunshi bunshi bunbo bunbo bunbo 1 3 2 1 class Bunsu { private int bunshi; private int bunbo; Bunsu(int a, int b) class Bunsu1 void print() { Bunsu plus(Bunsu other) Bunsu オブジェクト Bunsu plus(Bunsu other) { int newBunshi = this.bunshi*other.bunbo + other.bunshi+this.bunbo; int newBunbo = this.bunbo*other.bunbo; Bunsu p = new Bunsu(newBunshi,newBunbo); return p; } Bunsu p = new Bunsu(newBunshi,newBunbo); Bunsu オブジェクト 5 6 Bunsu オブジェクト

  10. bun1 bun2 other wa newBunbo newBunshi p 6 5 bunbo bunshi bunbo bunbo bunshi bunshi 1 2 1 5 3 6 class Bunsu1 Bunsu オブジェクト public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } Bunsu wa = bun1.plus(bun2); Bunsu plus(Bunsu other) { int newBunshi = this.bunshi*other.bunbo + other.bunshi+this.bunbo; int newBunbo = this.bunbo*other.bunbo; Bunsu p = new Bunsu(newBunshi,newBunbo); return p; } return p; Bunsu オブジェクト Bunsu オブジェクト

  11. bun1 bun2 wa bunbo bunshi bunshi bunbo bunbo bunshi 3 2 5 6 1 1 class Bunsu1 Bunsu オブジェクト Bunsu(int a, int b) public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } void print() { Bunsu plus(Bunsu other) void print() { if(bunbo==1) { … } else { System.out.print(“(“+bunshi+”/”+bunbo+”)”); } } bun1.print(); System.out.print(“(“+bunshi+”/”+bunbo+”)”); Bunsu オブジェクト Bunsu オブジェクト (1/2)

  12. bun2 bun1 wa bunshi bunshi bunbo bunbo bunbo bunshi 1 3 5 1 6 2 class Bunsu1 Bunsu オブジェクト Bunsu(int a, int b) public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } void print() { Bunsu plus(Bunsu other) System.out.print(“+”); Bunsu オブジェクト Bunsu オブジェクト (1/2) +

  13. bun2 bun1 wa bunshi bunshi bunbo bunbo bunbo bunshi 1 3 5 1 6 2 class Bunsu1 Bunsu オブジェクト Bunsu(int a, int b) public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } void print() { Bunsu plus(Bunsu other) bun2.print(); System.out.print(“=”); Bunsu オブジェクト Bunsu オブジェクト (1/2)+ (1/3)=

  14. bun2 bun1 wa bunshi bunshi bunbo bunbo bunbo bunshi 1 3 5 1 6 2 class Bunsu1 Bunsu オブジェクト Bunsu(int a, int b) public static void main(String args[]) { Bunsu bun1 = new Bunsu(1,2); Bunsu bun2 = new Bunsu(1,3); Bunsu wa = bun1.plus(bun2); bun1.print(); System.out.print("+"); bun2.print(); System.out.print("="); wa.print(); System.out.println(); } void print() { Bunsu plus(Bunsu other) wa.print(); System.out.println(); Bunsu オブジェクト Bunsu オブジェクト (1/2)+(1/3)= (5/6)

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