2015年05月13日 12:41

JS.LIM

edited: 2015年05月13日 12:41

반복문으로 해결 가능합니다.

import java.util.*;
public class ExampleTest {
 public static void main(String[] args) {
 Scanner scanner = new Scanner(System.in);
 System.out.print("입력 수 개수 > ");
 int inputNum = scanner.nextInt();
 int inputValue; int sum = 0;
 for(int a = 1; a <= inputNum; a++) {
 System.out.print("입력 수 > ");
 inputValue = scanner.nextInt();
 sum += inputValue;
 }
 System.out.println("합 : " +sum);
 System.out.println("평균 : " +sum/inputNum);
 }
}

자바 버전입니다..

import java.util.Scanner;
public class work {
 public static void main(String... args){
 Scanner scan = new Scanner(System.in);
 System.out.print("Number of item : ");
 int num = scan.nextInt();
 box start = new box(0, null);
 for(int i = 1 ; i<=num ; i++){
 System.out.println(i+" data : ");
 int get = scan.nextInt();
 if(i == 1) start.setItem(get);
 else start.setEnd(new box(get, null));
 }
 int sum = 0, avg;
 box point = start;
 while(true){
 sum += point.getItem();
 point = point.nextBox();
 if(point == null) break;
 }
 avg = sum/num;
 System.out.println("sum : "+sum+" avg : "+avg);
 }
} 
class box{
 private int item;
 private box next;
 public box(int item){this(item, null);}
 public box(int item, box next){this.item = item; this.next = next;}
 public int getItem(){return item;}
 public box nextBox(){return next;}
 public box setNext(box next){this.next = next; return next;}
 public int setItem(int item){this.item = item; return item;}
 public box setEnd(box end){
 if(next == null){next = end; return end;}
 else return next.setEnd(end);
 }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.stream.IntStream;
import static java.lang.System.in;
public class MemoryAllocation {
 public static void main(String[] args) {
 Scanner sc = new Scanner(in);
 int n = sc.nextInt();
 List<Integer> l = new ArrayList();
 IntStream.range(0, n).forEach(i -> {
 l.add(sc.nextInt());
 });
 System.out.println("합 : " + l.stream().mapToInt(Integer::intValue).sum());
 System.out.println("평균 : " + l.stream().mapToInt(Integer::intValue).average().orElse(0));
 l.clear();
 }
}

자바에서 메모리 해제라는게 조금 걸리네요..

 public static void main(String[] args) {
 ArrayList<Integer> list = new ArrayList<>();
 Scanner sc = new Scanner(System.in);
 System.out.print("입력할 정수의 개수를 입력하세요 : ");
 int num = sc.nextInt();
 for(int i=1;i<=num;i++){
 System.out.print("정수를 입력하세요 : ");
 list.add(sc.nextInt());
 }
 int sum=0;
 for(int i=0;i<list.size();i++){
 sum+=list.get(i);
 }
 System.out.println("총합은 : " + sum);
 System.out.printf("평균은 : %.2f" , (float)sum/num);
 list.clear();
 }

import java.util.*;
public class MemoryManagement {
 public static void main(String[] args) {
 Scanner sc = new Scanner(System.in);
 int cnt = sc.nextInt();
 int sum=0;
 for(int i=0;i<cnt;i++) {
 sum += sc.nextInt();
 }
 System.out.println(sum + " " + (sum/cnt));
 }
}

public class Example85 {
 public static void main(String[] args) {
 System.out.println("정수의 개수를 입력해 주세요.");
 Scanner scan = new Scanner(System.in);
 final int max = scan.nextInt();
 List<Integer> list = new ArrayList<>();
 for (int i = 0; i < max; i++) {
 System.out.println("정수를 입력하세요. : " + (max - i) + "번 남음");
 int num = scan.nextInt();
 list.add(num);
 }
 System.out.println("합계 : " + list.stream().mapToInt(x -> x).sum());
 System.out.println("평균" + list.stream().mapToInt(x -> x).sum() / (double)max);
 list.clear();
 }
}

자바

package cddj;
import java.util.Scanner;
public class cddj9 {
 public static void main(String[] args) {
 Scanner input = new Scanner(System.in);
 System.out.print("Number Of Integer : ");
 int N = input.nextInt();
 double sum = 0.0;
 for (int i = 0; i < N; i++) {
 sum += input.nextInt();
 }
 System.out.println(sum);
 System.out.println(sum/N);
 input = null;
 }
}

 Scanner sc = new Scanner(System.in);
 //처음 입력받는 개수
 System.out.print("처음변수입력 : ");
 int cntValue = sc.nextInt();
 System.out.println("-----------------------------------------------");
 int totalValue =0;
 for(int i=0; i<cntValue; i++)
 {
 System.out.print((i+1)+"번 변수입력 : ");
 totalValue += sc.nextInt();
 }
 System.out.println("-----------------------------------------------");
 System.out.println("총합 : "+totalValue);
 System.out.println("평균 : "+(double)totalValue/cntValue);

import java.util.*;
public class Malloc{ 
 public static void main(String[] args) {
 int num;
 int sum = 0;
 Scanner scan = new Scanner(System.in);
 System.out.print("입력할 정수의 개수: ");
 num = scan.nextInt();
 System.out.print("정수를 입력하시오: ");
 for(int i=0; i<num; i++) {
 int valueCollection = scan.nextInt(); 
 sum += valueCollection;
 } 
 System.out.println("정수의 합: " + sum);
 System.out.println("정수의 평균: "+ sum/num);
 scan.close();
 }
}

Console

입력할 정수의 개수: 5
정수를 입력하시오: 10 20 30 40 50
정수의 합: 150
정수의 평균: 30

public class ArrayListTest {
 public static void main(String[] args) {
 ArrayList<Integer> arraylist = new ArrayList<Integer>();
 Scanner scanner = new Scanner(System.in);
 System.out.print("정수 배열의 크기를 입력하세요 :");
 int number = scanner.nextInt();
 int sum = 0;
 double avg = 0.0;
 System.out.print("정수 " + number + "개를 엔터를 이용해서 입력하세요.");
 for(int i = 0; i < number; i++) {
 int num = scanner.nextInt();
 arraylist.add(num);
 sum += num;
 }
 avg = sum / number;
 System.out.println("합계는 : " + sum + ", 평균은 :" + avg + "입니다.");
 scanner.close();
 arraylist.clear();
 }
}