9일차_과제

1. 과일 판매량 구하기

월별 매출합계도 구하시오

[클래스]
Fruit
[필드]
pum, jan, feb, mar, tot
sumJan, sumFeb, sumMar
[메소드]
생성자(품명, 1월, 2월, 3월)
calcTot()
display()
public static void output()

[클래스]
FruitMain

[실행결과]
---------------------------------------
PUM      JAN      FEB      MAR      TOT
---------------------------------------
사과       100       80       75        255
포도        30       25       10        xxx
딸기        25       30       90        xxx
---------------------------------------
        xxx      xxx      xxx            output()로 처리

package homework03;

import homework03.FruitDTO;

class FruitDTO {
	String pum; // 품명
	int jan, feb, mar, tot; // 개수 
	static int sumJan, sumFeb, sumMar; // 합계

	public FruitDTO(String pum, int jan, int feb, int mar) {
		this.pum = pum;
		this.jan = jan;
		this.feb = feb;
		this.mar = mar;
	}
	
	public void calcTot() {
		this.tot = jan + feb + mar;
		this.sumJan += jan;
		this.sumFeb += feb;
		this.sumMar += mar;
	}
	
	public void display() {
		System.out.println(pum + "\t" + jan + "\t" + feb + "\t" + mar + "\t" + tot);
	}
	
	public static void output() {
		System.out.println("\t" + sumJan + "\t" + sumFeb + "\t" + sumMar);
	}

}

public class FruitMain {

	public static void main(String[] args) {
		System.out.println("----------------------------------------");
		System.out.println("PUM\tJAN\tFEB\tMAR\tTOT");
		System.out.println("----------------------------------------");
		
//		FruitDTO[] f = new FruitDTO[3];
//		f[0] = new FruitDTO("사과", 100, 80, 75);
//		f[1] = new FruitDTO("포도", 30, 25, 10);
//		f[2] = new FruitDTO("딸기", 25, 30, 90);
		
//		FruitDTO[] f = { new FruitDTO("사과", 100, 80, 75),
//						new FruitDTO("포도", 30, 25, 10),
//						new FruitDTO("딸기", 25, 30, 90)};
		
		FruitDTO[] f = new FruitDTO[] { new FruitDTO("사과", 100, 80, 75),
									new FruitDTO("포도", 30, 25, 10),
									new FruitDTO("딸기", 25, 30, 90)};
		
		for(int i=0; i<f.length; i++) {
			f[i].calcTot();
			f[i].display();
		}
		
		System.out.println("----------------------------------------");
		f[0].output();
	}

}