2021-01-06 자바 3과목 점수 (범위지정) 입력받아 계산

import java.util.Scanner;


public class 반복문테스트4 {
	

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner scan = new Scanner(System.in);
		
		int sum = 0;
		float avg = 0;
		int kor, eng, math;
		String classPoint = new String();
		
		kor = 0;
		eng = 0;
		math = 0;
		
		do{
			System.out.print("국어 점수 입력 : ");
			kor = scan.nextInt();
			
			if(kor < 0 || kor > 100){
				System.out.println("다시 입력 하세요");
			}
		}while(kor < 0 || kor > 100);
		
		do{
			System.out.print("영어 점수 입력 : ");
			eng = scan.nextInt();
			
			if(eng < 0 || eng > 100){
				System.out.println("다시 입력 하세요");
			}
		}while(eng < 0 || eng > 100);
		
		do{
			System.out.print("수학 점수 입력 : ");
			math = scan.nextInt();
			
			if(math < 0 || math > 100){
				System.out.println("다시 입력 하세요");
			}
		}while(math < 0 || math > 100);
		
		System.out.println(kor + " " + eng + " " + math);
		
		sum = kor + eng + math;
		avg = sum / 3;
		
		switch((int)avg/10){
		case 10:
			classPoint = "A";
			break;
		case 9:
			classPoint = "B";
			break;
		case 8:
			classPoint = "C";
			break;
		case 7:
			classPoint = "D";
			break;
		case 6:
			classPoint = "E";
			break;
		}
		
		System.out.println(avg/10);
		
		System.out.println("총점 : " + sum);
		System.out.println("평균 : " + avg);
		System.out.println("학점 : " + classPoint);
		
	}

}