summing 2 arrays to third array












0















i'm trying to make a program for my college task. it's about summing 2 arrays and the output into third array. but there's an error ArrayOutOfBoundsException but idk where's the error.

here's my source code 



Scanner sc = new Scanner(System.in);

    int arr1 = new int[3]; 

    int arr2 = new int[3]; 

    int i, j, k;

    for(i = 0; i < 3; i++) {

        System.out.print("Masukkan array pertama ke-" + i + ": ");

        arr1[i] = sc.nextInt();

    }



    for(j = 0; j < 3; j++) {

        System.out.print("Masukkan array kedua ke-" + j + ": ");

        arr2[j] = sc.nextInt();

    }



    for(k = 0; k < 4; k++) {

        int arr3 = new int[3];

        System.out.println(arr3[k] = arr1[i] + arr2[j]);

    }


the expected is like this 



arr1 = {1, 2, 3, 4}  

arr2 = {1, 2, 3, 4} 

arr3 = {2, 4, 6, 8}





java







share|improve this question

























  • arr3 is created on each loop iteration (which doesn't make sense) and surrounding for-loop has wrong conditional expression.

    – Michael Butscher
    Nov 13 '18 at 12:12











  • for(k = 0; k < 4; k++) is probably your issue. Shouldn't that be k < 3?

    – OldCurmudgeon
    Nov 13 '18 at 12:21
















0















i'm trying to make a program for my college task. it's about summing 2 arrays and the output into third array. but there's an error ArrayOutOfBoundsException but idk where's the error.

here's my source code 



Scanner sc = new Scanner(System.in);

    int arr1 = new int[3]; 

    int arr2 = new int[3]; 

    int i, j, k;

    for(i = 0; i < 3; i++) {

        System.out.print("Masukkan array pertama ke-" + i + ": ");

        arr1[i] = sc.nextInt();

    }



    for(j = 0; j < 3; j++) {

        System.out.print("Masukkan array kedua ke-" + j + ": ");

        arr2[j] = sc.nextInt();

    }



    for(k = 0; k < 4; k++) {

        int arr3 = new int[3];

        System.out.println(arr3[k] = arr1[i] + arr2[j]);

    }


the expected is like this 



arr1 = {1, 2, 3, 4}  

arr2 = {1, 2, 3, 4} 

arr3 = {2, 4, 6, 8}





java







share|improve this question

























  • arr3 is created on each loop iteration (which doesn't make sense) and surrounding for-loop has wrong conditional expression.

    – Michael Butscher
    Nov 13 '18 at 12:12











  • for(k = 0; k < 4; k++) is probably your issue. Shouldn't that be k < 3?

    – OldCurmudgeon
    Nov 13 '18 at 12:21














0












0








0








i'm trying to make a program for my college task. it's about summing 2 arrays and the output into third array. but there's an error ArrayOutOfBoundsException but idk where's the error.

here's my source code 



Scanner sc = new Scanner(System.in);

    int arr1 = new int[3]; 

    int arr2 = new int[3]; 

    int i, j, k;

    for(i = 0; i < 3; i++) {

        System.out.print("Masukkan array pertama ke-" + i + ": ");

        arr1[i] = sc.nextInt();

    }



    for(j = 0; j < 3; j++) {

        System.out.print("Masukkan array kedua ke-" + j + ": ");

        arr2[j] = sc.nextInt();

    }



    for(k = 0; k < 4; k++) {

        int arr3 = new int[3];

        System.out.println(arr3[k] = arr1[i] + arr2[j]);

    }


the expected is like this 



arr1 = {1, 2, 3, 4}  

arr2 = {1, 2, 3, 4} 

arr3 = {2, 4, 6, 8}





java







share|improve this question
















i'm trying to make a program for my college task. it's about summing 2 arrays and the output into third array. but there's an error ArrayOutOfBoundsException but idk where's the error.

here's my source code 



Scanner sc = new Scanner(System.in);

    int arr1 = new int[3]; 

    int arr2 = new int[3]; 

    int i, j, k;

    for(i = 0; i < 3; i++) {

        System.out.print("Masukkan array pertama ke-" + i + ": ");

        arr1[i] = sc.nextInt();

    }



    for(j = 0; j < 3; j++) {

        System.out.print("Masukkan array kedua ke-" + j + ": ");

        arr2[j] = sc.nextInt();

    }



    for(k = 0; k < 4; k++) {

        int arr3 = new int[3];

        System.out.println(arr3[k] = arr1[i] + arr2[j]);

    }


the expected is like this 



arr1 = {1, 2, 3, 4}  

arr2 = {1, 2, 3, 4} 

arr3 = {2, 4, 6, 8}





java




java






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 13 '18 at 12:29









Suraj Rao

22.8k75469




22.8k75469










asked Nov 13 '18 at 12:10









Rizky Putra Pradhana BudimanRizky Putra Pradhana Budiman

11




11













  • arr3 is created on each loop iteration (which doesn't make sense) and surrounding for-loop has wrong conditional expression.

    – Michael Butscher
    Nov 13 '18 at 12:12











  • for(k = 0; k < 4; k++) is probably your issue. Shouldn't that be k < 3?

    – OldCurmudgeon
    Nov 13 '18 at 12:21



















  • arr3 is created on each loop iteration (which doesn't make sense) and surrounding for-loop has wrong conditional expression.

    – Michael Butscher
    Nov 13 '18 at 12:12











  • for(k = 0; k < 4; k++) is probably your issue. Shouldn't that be k < 3?

    – OldCurmudgeon
    Nov 13 '18 at 12:21

















arr3 is created on each loop iteration (which doesn't make sense) and surrounding for-loop has wrong conditional expression.

– Michael Butscher
Nov 13 '18 at 12:12





arr3 is created on each loop iteration (which doesn't make sense) and surrounding for-loop has wrong conditional expression.

– Michael Butscher
Nov 13 '18 at 12:12













for(k = 0; k < 4; k++) is probably your issue. Shouldn't that be k < 3?

– OldCurmudgeon
Nov 13 '18 at 12:21





for(k = 0; k < 4; k++) is probably your issue. Shouldn't that be k < 3?

– OldCurmudgeon
Nov 13 '18 at 12:21












3 Answers
3






active

oldest

votes


















0














for(k = 0; k < 4; k++) {

        int arr3 = new int[3];

        System.out.println(arr3[k] = arr1[i] + arr2[j]);

    }


two major mistakes here. You do k < 4, while you should do k < 3
Also, you shouldn't re-create the array each iteration. Try this:



int arr3 = new int[3];

for(k = 0; k < 3; k++) {

        arr3[k] = arr1[k] + arr2[k]; // i and j don't make sense here.

    }


Printing the arrays, you can do after this.






share|improve this answer


























  • thank you, silly me for doing such a simple mistake!

    – Rizky Putra Pradhana Budiman
    Nov 13 '18 at 12:31



















0














Based on your expected output, your array size should be 4 instead of 3. Your code should look like this



    int arr1 = new int[4]; 

    int arr2 = new int[4];


Your code received an ArrayOutOfBoundsException because the k in your 3rd for loop should be 3 instead of 4 since your k should be less than your array size which is 3. One thing to mention is that instead of hard-coding your array size, it is a better practice to assign a variable to store the size of the array so that you will not need to keep track of the size. Or you can just do this every time you use a for loop:



    k < array.length





share|improve this answer































    -1














    The problem is the input length is 3 and the output length is 4.



    Scanner sc = new Scanner(System.in);
    
int arr1 = new int[3];
    
int arr2 = new int[3];
    
int i, j, k;
    

    
//Changed 3 below to 4
    

    
for(i = 0; i < 4; i++) {
    
    System.out.print("Masukkan array pertama ke-" + i + ": ");
    
    arr1[i] = sc.nextInt();
    
}
    

    
//Changed 3 below to 4;
    

    
for(j = 0; j < 4; j++) {
    
    System.out.print("Masukkan array kedua ke-" + j + ": ");
    
    arr2[j] = sc.nextInt();
    
}
    

    
for(k = 0; k < 4; k++) {
    
    int arr3 = new int[3];
    
    System.out.println(arr3[k] = arr1[i] + arr2[j]);
    
}





    share|improve this answer



















    • 1





      this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

      – Stultuske
      Nov 13 '18 at 12:23











    • Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

      – Jolaosho batmat
      Nov 13 '18 at 12:35













    • int arr1 = new int[3]; int arr2 = new int[3];

      – Stultuske
      Nov 13 '18 at 14:20











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    3 Answers
    3






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    3 Answers
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    oldest

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    0














    for(k = 0; k < 4; k++) {
    
        int arr3 = new int[3];
    
        System.out.println(arr3[k] = arr1[i] + arr2[j]);
    
    }


    two major mistakes here. You do k < 4, while you should do k < 3
    Also, you shouldn't re-create the array each iteration. Try this:



    int arr3 = new int[3];
    
for(k = 0; k < 3; k++) {
    
        arr3[k] = arr1[k] + arr2[k]; // i and j don't make sense here.
    
    }


    Printing the arrays, you can do after this.






    share|improve this answer


























    • thank you, silly me for doing such a simple mistake!

      – Rizky Putra Pradhana Budiman
      Nov 13 '18 at 12:31
















    0














    for(k = 0; k < 4; k++) {
    
        int arr3 = new int[3];
    
        System.out.println(arr3[k] = arr1[i] + arr2[j]);
    
    }


    two major mistakes here. You do k < 4, while you should do k < 3
    Also, you shouldn't re-create the array each iteration. Try this:



    int arr3 = new int[3];
    
for(k = 0; k < 3; k++) {
    
        arr3[k] = arr1[k] + arr2[k]; // i and j don't make sense here.
    
    }


    Printing the arrays, you can do after this.






    share|improve this answer


























    • thank you, silly me for doing such a simple mistake!

      – Rizky Putra Pradhana Budiman
      Nov 13 '18 at 12:31














    0












    0








    0







    for(k = 0; k < 4; k++) {
    
        int arr3 = new int[3];
    
        System.out.println(arr3[k] = arr1[i] + arr2[j]);
    
    }


    two major mistakes here. You do k < 4, while you should do k < 3
    Also, you shouldn't re-create the array each iteration. Try this:



    int arr3 = new int[3];
    
for(k = 0; k < 3; k++) {
    
        arr3[k] = arr1[k] + arr2[k]; // i and j don't make sense here.
    
    }


    Printing the arrays, you can do after this.






    share|improve this answer















    for(k = 0; k < 4; k++) {
    
        int arr3 = new int[3];
    
        System.out.println(arr3[k] = arr1[i] + arr2[j]);
    
    }


    two major mistakes here. You do k < 4, while you should do k < 3
    Also, you shouldn't re-create the array each iteration. Try this:



    int arr3 = new int[3];
    
for(k = 0; k < 3; k++) {
    
        arr3[k] = arr1[k] + arr2[k]; // i and j don't make sense here.
    
    }


    Printing the arrays, you can do after this.







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited Nov 13 '18 at 12:23

























    answered Nov 13 '18 at 12:12









    StultuskeStultuske

    6,06811626




    6,06811626













    • thank you, silly me for doing such a simple mistake!

      – Rizky Putra Pradhana Budiman
      Nov 13 '18 at 12:31



















    • thank you, silly me for doing such a simple mistake!

      – Rizky Putra Pradhana Budiman
      Nov 13 '18 at 12:31

















    thank you, silly me for doing such a simple mistake!

    – Rizky Putra Pradhana Budiman
    Nov 13 '18 at 12:31





    thank you, silly me for doing such a simple mistake!

    – Rizky Putra Pradhana Budiman
    Nov 13 '18 at 12:31













    0














    Based on your expected output, your array size should be 4 instead of 3. Your code should look like this



        int arr1 = new int[4]; 
    
    int arr2 = new int[4];


    Your code received an ArrayOutOfBoundsException because the k in your 3rd for loop should be 3 instead of 4 since your k should be less than your array size which is 3. One thing to mention is that instead of hard-coding your array size, it is a better practice to assign a variable to store the size of the array so that you will not need to keep track of the size. Or you can just do this every time you use a for loop:



        k < array.length





    share|improve this answer




























      0














      Based on your expected output, your array size should be 4 instead of 3. Your code should look like this



          int arr1 = new int[4]; 
      
    int arr2 = new int[4];


      Your code received an ArrayOutOfBoundsException because the k in your 3rd for loop should be 3 instead of 4 since your k should be less than your array size which is 3. One thing to mention is that instead of hard-coding your array size, it is a better practice to assign a variable to store the size of the array so that you will not need to keep track of the size. Or you can just do this every time you use a for loop:



          k < array.length





      share|improve this answer


























        0












        0








        0







        Based on your expected output, your array size should be 4 instead of 3. Your code should look like this



            int arr1 = new int[4]; 
        
    int arr2 = new int[4];


        Your code received an ArrayOutOfBoundsException because the k in your 3rd for loop should be 3 instead of 4 since your k should be less than your array size which is 3. One thing to mention is that instead of hard-coding your array size, it is a better practice to assign a variable to store the size of the array so that you will not need to keep track of the size. Or you can just do this every time you use a for loop:



            k < array.length





        share|improve this answer













        Based on your expected output, your array size should be 4 instead of 3. Your code should look like this



            int arr1 = new int[4]; 
        
    int arr2 = new int[4];


        Your code received an ArrayOutOfBoundsException because the k in your 3rd for loop should be 3 instead of 4 since your k should be less than your array size which is 3. One thing to mention is that instead of hard-coding your array size, it is a better practice to assign a variable to store the size of the array so that you will not need to keep track of the size. Or you can just do this every time you use a for loop:



            k < array.length






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 13 '18 at 23:25









        siang swee kongsiang swee kong

        663




        663























            -1














            The problem is the input length is 3 and the output length is 4.



            Scanner sc = new Scanner(System.in);
            
int arr1 = new int[3];
            
int arr2 = new int[3];
            
int i, j, k;
            

            
//Changed 3 below to 4
            

            
for(i = 0; i < 4; i++) {
            
    System.out.print("Masukkan array pertama ke-" + i + ": ");
            
    arr1[i] = sc.nextInt();
            
}
            

            
//Changed 3 below to 4;
            

            
for(j = 0; j < 4; j++) {
            
    System.out.print("Masukkan array kedua ke-" + j + ": ");
            
    arr2[j] = sc.nextInt();
            
}
            

            
for(k = 0; k < 4; k++) {
            
    int arr3 = new int[3];
            
    System.out.println(arr3[k] = arr1[i] + arr2[j]);
            
}





            share|improve this answer



















            • 1





              this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

              – Stultuske
              Nov 13 '18 at 12:23











            • Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

              – Jolaosho batmat
              Nov 13 '18 at 12:35













            • int arr1 = new int[3]; int arr2 = new int[3];

              – Stultuske
              Nov 13 '18 at 14:20
















            -1














            The problem is the input length is 3 and the output length is 4.



            Scanner sc = new Scanner(System.in);
            
int arr1 = new int[3];
            
int arr2 = new int[3];
            
int i, j, k;
            

            
//Changed 3 below to 4
            

            
for(i = 0; i < 4; i++) {
            
    System.out.print("Masukkan array pertama ke-" + i + ": ");
            
    arr1[i] = sc.nextInt();
            
}
            

            
//Changed 3 below to 4;
            

            
for(j = 0; j < 4; j++) {
            
    System.out.print("Masukkan array kedua ke-" + j + ": ");
            
    arr2[j] = sc.nextInt();
            
}
            

            
for(k = 0; k < 4; k++) {
            
    int arr3 = new int[3];
            
    System.out.println(arr3[k] = arr1[i] + arr2[j]);
            
}





            share|improve this answer



















            • 1





              this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

              – Stultuske
              Nov 13 '18 at 12:23











            • Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

              – Jolaosho batmat
              Nov 13 '18 at 12:35













            • int arr1 = new int[3]; int arr2 = new int[3];

              – Stultuske
              Nov 13 '18 at 14:20














            -1












            -1








            -1







            The problem is the input length is 3 and the output length is 4.



            Scanner sc = new Scanner(System.in);
            
int arr1 = new int[3];
            
int arr2 = new int[3];
            
int i, j, k;
            

            
//Changed 3 below to 4
            

            
for(i = 0; i < 4; i++) {
            
    System.out.print("Masukkan array pertama ke-" + i + ": ");
            
    arr1[i] = sc.nextInt();
            
}
            

            
//Changed 3 below to 4;
            

            
for(j = 0; j < 4; j++) {
            
    System.out.print("Masukkan array kedua ke-" + j + ": ");
            
    arr2[j] = sc.nextInt();
            
}
            

            
for(k = 0; k < 4; k++) {
            
    int arr3 = new int[3];
            
    System.out.println(arr3[k] = arr1[i] + arr2[j]);
            
}





            share|improve this answer













            The problem is the input length is 3 and the output length is 4.



            Scanner sc = new Scanner(System.in);
            
int arr1 = new int[3];
            
int arr2 = new int[3];
            
int i, j, k;
            

            
//Changed 3 below to 4
            

            
for(i = 0; i < 4; i++) {
            
    System.out.print("Masukkan array pertama ke-" + i + ": ");
            
    arr1[i] = sc.nextInt();
            
}
            

            
//Changed 3 below to 4;
            

            
for(j = 0; j < 4; j++) {
            
    System.out.print("Masukkan array kedua ke-" + j + ": ");
            
    arr2[j] = sc.nextInt();
            
}
            

            
for(k = 0; k < 4; k++) {
            
    int arr3 = new int[3];
            
    System.out.println(arr3[k] = arr1[i] + arr2[j]);
            
}






            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 13 '18 at 12:20









            Jolaosho batmatJolaosho batmat

            94




            94








            • 1





              this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

              – Stultuske
              Nov 13 '18 at 12:23











            • Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

              – Jolaosho batmat
              Nov 13 '18 at 12:35













            • int arr1 = new int[3]; int arr2 = new int[3];

              – Stultuske
              Nov 13 '18 at 14:20














            • 1





              this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

              – Stultuske
              Nov 13 '18 at 12:23











            • Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

              – Jolaosho batmat
              Nov 13 '18 at 12:35













            • int arr1 = new int[3]; int arr2 = new int[3];

              – Stultuske
              Nov 13 '18 at 14:20








            1




            1





            this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

            – Stultuske
            Nov 13 '18 at 12:23





            this answer is plain wrong. your code would crash on arrayIndexOutOfBounds. The length of the arrays is still 3, while you are going to look for fourth elements

            – Stultuske
            Nov 13 '18 at 12:23













            Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

            – Jolaosho batmat
            Nov 13 '18 at 12:35







            Using this data: arr1 = {1, 2, 3, 4} arr2 = {1, 2, 3, 4} arr3 = {2, 4, 6, 8} the length of each array is 4.

            – Jolaosho batmat
            Nov 13 '18 at 12:35















            int arr1 = new int[3]; int arr2 = new int[3];

            – Stultuske
            Nov 13 '18 at 14:20





            int arr1 = new int[3]; int arr2 = new int[3];

            – Stultuske
            Nov 13 '18 at 14:20


















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