Question

You live in a big apartment block, and sorting mail and parcels is quite a complex task. Write a program that reads in a file with all the deliveries, asks for the user's name and prints out a summary of all the mail.

Your program should read in a file named mail.txt that looks like this:

Jane Fairfax,Letter

Frank Churchill,Letter

Emma Woodhouse,Letter

Frank Churchill,Letter

Harriet Smith,Package

Emma Woodhouse,Letter

Philip Elton,Package

Emma Woodhouse,Package

Your program should work like this:

Name: Emma Woodhouse

2 Letters

1 Package

​

Here is another example:

Name: Jane Fairfax

1 Letter

No Packages

​

If the person doesn't have any mail, your program should work like this:

Name: Elizabeth Bennet

No mail

Answer 1

Note:

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As the programming language is not specified in question, Java is used. Please give the correct file path. currently it is assumed mail.txt file is in same directory as that of program

//######################## PGM START ##################################

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

public class CheckMail {

   public static void main(String[] args) {
       String line[]=new String[2];
       int letterCount=0;
       int packageCount=0;
      
       //array list to store name and item
       ArrayList<String> n1=new ArrayList<String>();
       ArrayList<String> v1=new ArrayList<String>();
       Scanner s=new Scanner(System.in);
      
       Scanner file1=null;
       try {
           //reading the file mail.txt
           file1 = new Scanner(new File("mail.txt"));
           //while file has next line
           while(file1.hasNext()) {
               //read the line, split using ,
               line=file1.nextLine().split(",");
               //store the result in array list
               n1.add(line[0]);
               v1.add(line[1]);
           }
       } catch (FileNotFoundException e) {
           System.out.println("Cant find the file mail.txt in current folder");
           e.printStackTrace();
       }
       //request name from user
       System.out.print("Name: ");
       String name=s.nextLine();
       //iterate till end of array list
       for(int i=0;i<n1.size();i++ ) {
           //check if name matches
           if(name.equalsIgnoreCase(n1.get(i))) {
              
               //increment letter or package count if it is present
               if(v1.get(i).equalsIgnoreCase("Letter"))
                   letterCount++;
               else if(v1.get(i).equalsIgnoreCase("Package"))
                   packageCount++;
           }  
       }
      
       //print msg according to letter and package count
       if(letterCount>0)
           System.out.println(letterCount+" Letter");
       if(packageCount>0)
           System.out.println(packageCount+" Package");
       if(letterCount==0 && packageCount==0)
           System.out.println("No mail");
       else if(letterCount>0 && packageCount==0)
           System.out.println("No Packages");
       else if(letterCount==0 && packageCount>0)
           System.out.println("No Letters");
      
      
       s.close();
       file1.close();

   }

}

//############################## PGM END #############################

OUTPUT
#########