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Kop's questions

Martin Hope
Kop
Asked: 2022-10-26 02:25:26 +0800 CST
  • 1

I have a problem that I raised before and as they told me, I need to show code and be more specific, so here I go. I have to introduce the variable precioby Scanner in a method, and I want to later send that variable precioto the mainto use it in the 2nd method. On the other hand, I would also like to use only one returnto round two figures, but I don't see how. My code:

import java.util.*;

public class Precios {

   public static void main(String[] args) {

      Scanner teclado = new Scanner(System.in);
              
      preciosPorcentajes(teclado);
      preciosSemanales(teclado, precio);
      
   }

   public static void preciosPorcentajes(Scanner teclado) {
      System.out.print("Introduce precio: ");
      double precio = teclado.nextDouble();
      
      for (int i = 1; i <= 3; i++) {
        double porcentaje = 1.0;
        double intereses = precio * porcentaje / 100 * i;
        
        System.out.print(i + " años \t" + intereses * (1.0) + "(1.0%) \t" + intereses * (1.5) + "(1.5%) \t");
      }      
   }
   
   public static void preciosSemanales(Scanner teclado, double precio) {
   
      System.out.print("Introduce el Precio anual: ");
      double precioAnual = teclado.nextDouble();
      System.out.print("Introduce la tasa: ");
      double tasas = teclado.nextDouble();
      System.out.print("Introduce la duración: ");
      int semanas = teclado.nextInt();
   
      for(int i = 1; i <= semanas; i++) {
         double intereses = precio * tasaInteres / 100;
         intereses = redondear(precio, intereses);
         System.out.println("Semana " + i);
         System.out.println("\t Precio Anual: " + (precio));
         System.out.println("\t Intereses: " + intereses);
         precio += intereses + precioAnual;
         precio = redondear(precio, intereses);
      }   
   }    
   public static double redondear(double precio, double intereses) {
   double num = Math.round(precio * 100) / 100.0;
   double num = Math.round(intereses * 100) / 100.0;
   return num;
   }
}

Thanks for the help.

java
Martin Hope
Kop
Asked: 2022-10-22 05:47:03 +0800 CST
  • 2

I'm just starting out with Java and I'm stuck with this problem, for which I can only use For loops and the Math class. The problem is that I can not increase the rate. This is what should appear on the screen:

5 years 250.0(1.0%) 375.0(1.5%) 500.0(2.0%) 625.0(2.5%)
6 years 300.0(1.0%) 450.0(1.5%) 650.0(2.0%) 750.0(2.5%)
7 years 350.0(1.0% ) 525.0(1.5%) 700.0(2.0%) 875.0(2.5%)
8 years 400.0(1.0%) 600.0(1.5%) 800.0(2.0%) 1000.0(2.5%)

and this what I get:

5 years 250.0(1.0%) 250.0(1.5%) 250.0(2.0%) 250.0(2.5%)
6 years 250.0(1.0%) 250.0(1.5%) 250.0(2.0%) 250.0(2.5%)
7 years 250.0(1.0% ) 250.0(1.5%) 250.0(2.0%) 250.0(2.5%)
8 years 250.0(1.0%) 250.0(1.5%) 250.0(2.0%) 250.0(2.5%).

This is the code I have so far:

   double capitalInicial = 5000.0;
   double tasa = 1.0;
   int anios = 5;
   double intereses = capitalInicial * tasa / 100 * anios;
   for(int i = 5; i <= 8; i++) {
   System.out.println(i + " años \t" + intereses + "(1.0%) \t" + intereses + "(1.5%) \t" + intereses + "(2.0%) \t" + intereses + "(2.5%) \t");

I appreciate the help.

java