How to add months and days for a simple interest-rate calculation (Java)

问题

I am working on a program for an assignment. There I got stuck on how to add the days and months for my program.

I can already convert the simple interest into years, but not for months and days:

  import java.util.Scanner;

  public class SimpleInterest {

    public static void main(String[] args) {
        double PAmount, ROI, TimePeriod, simpleInterset;
        Scanner scanner = new Scanner(System.in);

        System.out.print(" Please Enter the Principal Amount : ");
        PAmount = scanner.nextDouble();

        System.out.print(" Please Enter the Rate Of Interest : ");
        ROI = scanner.nextDouble();

        System.out.print(" Please Enter the Time Period in Years : ");
        TimePeriod = scanner.nextDouble();

        simpleInterset = (PAmount * ROI * TimePeriod) / 100;

        System.out.println("\n The Simple Interest for Principal Amount " + PAmount + " is = " + 
        simpleInterset);   
    }    
  }

回答1:

Just ask them separatly then compute the global time

System.out.print(" Please Enter the Principal Amount : ");
double pAmount = Double.parseDouble(scanner.nextLine());

System.out.print(" Please Enter the Rate Of Interest : ");
double rOI = Double.parseDouble(scanner.nextLine());

System.out.print(" Please Enter the Time Period in Years : ");
double years = Double.parseDouble(scanner.nextLine());
System.out.print("And months : ");
double months = Double.parseDouble(scanner.nextLine());
System.out.print("And days");
double days = Double.parseDouble(scanner.nextLine());

double timePeriod = years * months / 12 + days / 365;
double simpleInterset = (pAmount * rOI * timePeriod) / 100;

System.out.println("\n The Simple Interest for Principal Amount " + pAmount + " is = " + simpleInterset);

I'd suggest :

don't define variable before using it if you don't need to do so
use nextLine and parse what you need, you'll avoid suprise with return char
as Java convention, use lowerCamelCase to name your variables

来源：https://stackoverflow.com/questions/59078106/how-to-add-months-and-days-for-a-simple-interest-rate-calculation-java

标签

java

finance

calculation