//--------------- jp.av.dev@gmail.com ---------------//
/* Switch Case, Scanner, Random, For, While, Do While*/
package apuntes.pkg;

import java.util.Random;
import java.util.Scanner;

public class SwitchDoWhileFor {

    public static void main(String[] args) {
        int notas[]= new int[20];
        Random r = new Random();
        Scanner s = new Scanner(System.in);
        System.out.println("");
        int opc = 0;
        do{
            System.out.println("0 Salir\n1 Llenar arreglo\n2 Imprimir");
            opc = s.nextInt();
            switch(opc){
                case 0:
                    System.out.println("Opcion 0");
                    break;
                case 1:
                            for (int i = 0; i < 20; i++) {
                            int numero = (int) (Math.random() * 70) + 20;
                            notas[i] = numero;}
                    break;
                case 2:
                    for (int i = 0; i < 20; i++) {
                        System.out.print(notas[i] + ", ");
                    }
                        System.out.println("\n");  
                    break;
                case 3:
                    float suma = 0,promedio = 0; //FLOAT asignacion Numero REAL
                    for (int i = 0; i < 200; i++) {
                        suma = suma + notas[i];
                    }
                        promedio = suma/20;
                        System.out.println("El promedio es " + promedio);
                    break;
            }
        }while(opc!=0);                

    } //END MAIN
    
} //END CLASS