class TV{
String company;
int inch;
int cost;
TV(String company,int inch, int cost){
this.company=company;
this.inch=inch;
this.cost=cost;
}
public void show() {
System.out.printf("%s에서 만든 %d만원짜리의 %d인치 TV",company,inch,cost);
}
}
public class ex4_1 {
public static void main(String[] args) {
TV tv=new TV("Samsung",50,300);
tv.show();
}
}
2번
class Cube{
int length;
int width;
int height;
public Cube(int a,int b, int c){
this.length=a;
width=b;
height=c;
}
public int getVolume() {
return length*width*height;
}
public void increase(int num1, int num2, int num3) {
length+=num1;
width+=num2;
height+=num3;
}
public boolean isZero() {
if(getVolume()==0) {
return true;
}
else {
return false;
}
}
}
public class ex4_2 {
public static void main(String[] args) {
Cube cube=new Cube(1,2,3);
System.out.println("큐브의 부피는 "+cube.getVolume());
cube.increase(1, 2, 3);
System.out.println("큐브의 부피는 "+cube.getVolume());
if(cube.isZero()) {
System.out.println("큐브의 부피는 0");
}
else {
System.out.println("큐브의 부피는 0이 아님");
}
}
}
3번
import java.util.Scanner;
class Grade{
String name;
int javaScore;
int webScore;
int osScore;
public Grade(String name,int java, int web, int os) {
this.name=name;
this.javaScore=java;
this.webScore=web;
this.osScore=os;
}
public String getName() {
return name;
}
public int getAverage() {
return ((javaScore+webScore+osScore)/3);
}
}
public class ex4_3 {
public static void main(String[] args) {
Scanner scanner=new Scanner(System.in);
System.out.print("이름, 자바, 웹프로그래밍, 운영체제 순으로 점수 입력>>");
String name=scanner.next();
int java=scanner.nextInt();
int web=scanner.nextInt();
int os=scanner.nextInt();
Grade st=new Grade(name,java,web,os);
System.out.print(st.getName()+"의 평균은 "+st.getAverage());
scanner.close();
}
}
4번
class Average{
int average[]=new int[10];
int i=0;
public void put(int num) {
average[i]=num;
i++;
}
public void showAll() {
for(int j=0;j<i;j++) {
System.out.print(average[j]+" ");
}
}
public double getAvg() {
double sum=0;
for(int j=0;j<i;j++) {
sum+=average[j];
}
return (sum)/i;
}
}
public class ex4_4 {
public static void main(String[] args) {
Average avg=new Average();
avg.put(10);
avg.put(15);
avg.put(100);
avg.showAll();
System.out.print("평균은 "+avg.getAvg());
}
}
7번
class Memo{
String name;
String time;
String content;
public Memo(String name,String time,String content) {
this.name=name;
this.time=time;
this.content=content;
}
public boolean isSameName(Memo b) {
if(this.name.equals(b.name)) {
return true;
}
else {
return false;
}
}
public String getName() {
return this.name;
}
public void show() {
System.out.println(name);
System.out.println(time);
System.out.println(content);
}
public int length() {
return this.content.length();
}
}
public class ex4_7 {
public static void main(String[] args) {
Memo a=new Memo("유송연","10:10","자바 과제 있음");
Memo b=new Memo("박채원","10:15","시카고로 어학연수가요~!");
Memo c=new Memo("김경미","11:30","돈 갚아야해요");
a.show();
if(a.isSameName(b)) {
System.out.println("동일한 사람입니다.");
}
else {
System.out.println("다른 사람입니다.");
}
System.out.println(c.getName()+"가 작성한 메모의 길이는 "+c.length());
}
}
8번
class Account{
private int money=0;
public Account(int money){
this.money+=money;
}
public void deposit(int depositMoney) {
this.money+=depositMoney;
}
public void deposit(int depositMoney[]) {
for(int i=0;i<depositMoney.length;i++) {
this.money+=depositMoney[i];
}
}
public int getBalance() {
return money;
}
public int withdraw(int money) {
if(this.money>=money) {
this.money-=money;
return money;
}
else {
this.money-=this.money;
return this.money;
}
}
}
public class ex4_8 {
public static void main(String[] args) {
Account a=new Account(100);
a.deposit(5000);
System.out.println("잔금은 "+ a.getBalance()+"원입니다.");
int bulk[]= {100,500,200,700};
a.deposit(bulk);
System.out.println("잔금은 "+ a.getBalance()+"원입니다.");
int money=1000;
int wMoney=a.withdraw(money);
if(wMoney<money) {
System.out.println(wMoney+"원만 인출");
}
else {
System.out.println(wMoney+"원 인출");
}
System.out.println("잔금은 "+ a.getBalance()+"원입니다.");
}
}
9번
import java.util.Scanner;
class Player{
String name;
int number;
int gamePoint=0;
}
class GuessGame{
Scanner scanner=new Scanner(System.in);
int playerNumber;
Player[] player;
public void start() {
System.out.println("*** 예측 게임을 시작합니다. ***");
System.out.print("게임에 참여할 선수 수>>");
playerNumber=scanner.nextInt();
player=new Player[playerNumber];
for(int i=0;i<playerNumber;i++) {
player[i] = new Player(); //Player 객체 생성하고 할당
System.out.print("선수 이름>>");
player[i].name=scanner.next();
}
}
public void run() {
System.out.println("1~100사이의 숫자가 결정되었습니다. 선수들은 맞추어 보세요.");
int hiddenAnswer=(int)(Math.random()*100+1);
int diff[]=new int[playerNumber];
for(int i=0;i<playerNumber;i++) {
System.out.print(player[i].name + ">>");
player[i].number=scanner.nextInt();
diff[i]=Math.abs(hiddenAnswer-player[i].number);
}
int min=diff[0];
int winner=0;
for(int i=0;i<playerNumber;i++) {
if(min>diff[i]) {
min=diff[i];
winner=i;
}
}
System.out.println("정답은 "+hiddenAnswer+"."+player[winner].name+"이 이겼습니다. 승점 1점 확보!");
player[winner].gamePoint++;
}
public void result() {
for(int i=0;i<playerNumber;i++) {
System.out.printf("%s:"+player[i].gamePoint+" ",player[i].name);
}
}
}
public class ex4_9 {
public static void main(String[] args) {
GuessGame game=new GuessGame();
Scanner scanner=new Scanner(System.in);
game.start();
while(true) {
game.run();
System.out.print("계속하려면 yes 입력>>");
String repeat=scanner.next();
if(!repeat.equals("yes")) {
break;
}
}
game.result();
}
}
