Thread: Using File Data

So our assignment calls for us to copy data into a text file and use the file with the data in it to calculate some stuff. Everything works EXCEPT for the calculation of percent increase/decrease between the numbers. Below the code is my current output.

import java.io.*;
import java.util.*;

public class Cert{
public static void main(String[] args)
throws FileNotFoundException{
Scanner certFile = new Scanner(new File("C:\\Users\\Zofia\\Documents\\Courses\\COSC 236\\Programs\\Lab5\\cert1.txt"));

int total = 0;
int newVul = 1;
int oldVul;
while (certFile.hasNextInt()){
int year = certFile.nextInt();
oldVul = newVul;
newVul = certFile.nextInt();
if (oldVul!=newVul){
double pChange = (double)((newVul-oldVul)/oldVul)*100;
total +=newVul;
System.out.println("In the year " + year + ", there were " + newVul + " vulnerabilities.");
if (total!=newVul){
System.out.println("There is a " + pChange + "% change between " + (year-1) +" and " + year);
}
}
}
System.out.println("The total vulnerabilities is " + total);
}
}






In the year 1995, there were 171 vulnerabilities.
In the year 1996, there were 345 vulnerabilities.
There is a 100.0% change between 1995 and 1996
In the year 1997, there were 311 vulnerabilities.
There is a 0.0% change between 1996 and 1997
In the year 1998, there were 262 vulnerabilities.
There is a 0.0% change between 1997 and 1998
In the year 1999, there were 417 vulnerabilities.
There is a 0.0% change between 1998 and 1999
In the year 2000, there were 1090 vulnerabilities.
There is a 100.0% change between 1999 and 2000
In the year 2001, there were 2437 vulnerabilities.
There is a 100.0% change between 2000 and 2001
In the year 2002, there were 4129 vulnerabilities.
There is a 0.0% change between 2001 and 2002
In the year 2003, there were 3784 vulnerabilities.
There is a 0.0% change between 2002 and 2003
In the year 2004, there were 3780 vulnerabilities.
There is a 0.0% change between 2003 and 2004
In the year 2005, there were 5990 vulnerabilities.
There is a 0.0% change between 2004 and 2005
In the year 2006, there were 8064 vulnerabilities.
There is a 0.0% change between 2005 and 2006
In the year 2007, there were 7236 vulnerabilities.
There is a 0.0% change between 2006 and 2007
The total vulnerabilities is 38016.