What is the average rainfall of French Guiana?

Java Problem Avg Rainfall?

• I need help writing a program using nested loops. Im trying to create a program that uses nested loops to collect data and calculate the average rainfall over a period of years. First the program should ask for the number of years. The outer loop will iterate once for each year. The inner loop will interate 12 times, once for each month. Each iteration of the inner loop will ask the user for the inches of rainfall for that month. After all interations, the program needs to display the number of months, the total inches of rainfall, and the average rainfall per month for the entire period using JOptionPane. The problem I'm having is the >0 or <1 verfication, and calculation. I think i'm doing something completely wrong :( import javax.swing.JOptionPane; // import GUI class import java.text.DecimalFormat; public class avgRain { /** * Rob Thompson * Assignment 5 * pg 243 #8 - Average Rainfall */ public static void main(String[] args) { // Declare Variables int rainfall; int year; int total=0; double average=0; String input; // input - Years and Inches of Rainfall // output - avg rainfall per month // Processing - d = s * t // Ask user to enter years do { input = JOptionPane.showInputDialog("How many years to calculate?"); year=Integer.parseInt(input); } // while year <=1 error msg and loop back while(year>=1); { input = JOptionPane.showInputDialog("Please enter a number greater than one"); year=Integer.parseInt(input); } for(int i = 0;i<year;i++) { for (int month = 1; month <= 12; month++) { input = JOptionPane.showInputDialog("Enter the inches of rainfall for month " +month); rainfall=Integer.parseInt(input); // while rainfall >0 error msg and loop back while (rainfall>0) { input = JOptionPane.showInputDialog("Please enter a number greater than zero" +month); rainfall=Integer.parseInt(input); average = Double.parseDouble(input); average=((double)total) / 12.0; System.out.println("The total for year # "+ i + " is " + total ); System.out.println("The average for year # "+ i + " is " + (average )); } } } } }

• Answer:

  do { input = JOptionPane.showInputDialog("How many years to calculate?"); year=Integer.parseInt(input); }while(year<1); double gtotal=0; for(int i = 0;i<year;i++) { double total=0; for (int month = 1; month <= 12; month++) { do { input = JOptionPane.showInputDialog("Enter the inches of rainfall for month " +month); rainfall=Integer.parseInt(input); }while (rainfall<0); total +=rainfall; gtotal +=rainfal; } average=((double)total) / 12.0; System.out.println("The total for year # "+ i + " is " + total ); System.out.println("The average for year # "+ i + " is " + (average )); } } System.out.println("Average rainfall for all years=" + (gtotal/(12*years)) );