Question

**Java**

Assume that indata1 and indata2 are two files containing at least two integers, separated by white space.

Write a program named Add2 that writes the sum of the first integers of these two files to a file named outdata1. It writes the sum of the first integers of these two files to a file named outdata2. Each sum is written on a line by itself.

So, if the contents of indata1 were "37 6 90" and the contents of indata2 were "1 4 9" then outdata1 would get 38 and outdata2 would get 10.

This is what i got

import java.util.Scanner;
import java.io.File;
import java.io.PrintWriter;
public class Add2{
public static void main(String[] args) throws Exception{
File f1 = new File("indata1.txt");
File f2 = new File("indata2.txt");
Scanner data1 = new Scanner(f1);
Scanner data2 = new Scanner(f2);   
int x1 = data1.nextInt();
int y1 = data1.nextInt();
int x2 = data2.nextInt();
int y2 = data2.nextInt();
File out1 = new File("outdata1");
File out2 = new File("outdata2");
PrintWriter pw1 = new PrintWriter(out1);   
PrintWriter pw2 = new PrintWriter(out2);
pw2.println(x1+x2);
pw1.println(y1+y2);
pw1.close();
pw2.close();
}
}
and this is the error i get on codelab:

• The value of outdata1 is incorrect
• The value of outdata2 is incorrect
• outdata1 was not assigned a value
• outdata2 was not assigned a value

what am i doing wrong here?

Thanks.

Answer 1

The program runs perfectly fine. Please try rerunning the code

INPUT
########

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

import java.util.Scanner;
import java.io.File;
import java.io.PrintWriter;

public class Add2{
   public static void main(String[] args) throws Exception{
       File f1 = new File("indata1.txt");
       File f2 = new File("indata2.txt");
      
      
       if(f1.exists() && f2.exists()) {
           Scanner data1 = new Scanner(f1);
           Scanner data2 = new Scanner(f2);
          
           int x1 = data1.nextInt();
           int y1 = data1.nextInt();
           int x2 = data2.nextInt();
           int y2 = data2.nextInt();
          
           File out1 = new File("outdata1");
           File out2 = new File("outdata2");
          
           if(out1 !=null && out2!=null) {
               PrintWriter pw1 = new PrintWriter(out1);
               PrintWriter pw2 = new PrintWriter(out2);
               pw1.println(x1+x2);
               pw2.println(y1+y2);
               pw1.close();
               pw2.close();
           }
          
          
           data1.close();
           data2.close();
       }
      
   }
}

//###############################################################

OUTPUT
#########