public class AverageGasPrice
1: import java.util.*;
2:
3: public class AverageGasPrice
4: {
5: public static void main(String[] args)
6: {
7: double[] gasPrice = new double[25];
8: int priceCount = 0;
9: double price = 0;
10:
11: Scanner keyboard = new Scanner(System.in);
12: System.out.println("This program calculates and displays the average");
13: System.out.println("price of a regular gallon of gas.");
14:
15: System.out.println("Enter the price of gas or -99 to Quit: ");
16: price = keyboard.nextDouble();
17:
18: while(price != -99)
19: {
20: gasPrice[priceCount] = price;
21: priceCount++;
22: price = keyboard.nextDouble();
23: }
24:
25: //Compute the average
26: double sum = 0;
27:
28: for(int i=0; i < priceCount; i++)
29: {
30: sum = sum + gasPrice[i];
31: }
32:
33: double average = sum/priceCount;
34:
35: System.out.print("\n\nThe average price per gallon of regular");
36: System.out.println(" gas is " + average);
37:
38: }
39: }