Hey there!! Back with another question...this code's output says "no output"...

Question

As I click on "Run" ... Instead of taking two array inputs...it says "no output"!!! 😅😅
Here's the code :
https://code.sololearn.com/c40hvKzZkVJm/?ref=app

Answer 1

MJ Tech

// Created by MJ Tech
import java.util.*;
class Merge
{
public static void main(String args[])
{
int a[] = new int[5];
int b[] = new int[5];

// taking input fir two arrays

Scanner sc = new Scanner (System.in);

for (int i=1; i<a.length; i++)
{
a[i] = sc.nextInt();
}

for(int i=1; i<b.length; i++)
{
b[i] = sc.nextInt();
}

int c[]=new int[10];
for (int i=0; i<a.length; i++)
c[i] = a[i];

for (int j=0; j<b.length;j++)
c[j+a.length]=b[j];

System.out.println ("The merged array is ");
for (int k=0; k<c.length;k++)
{
System.out.print(c[k]+",");
}
}
}

MJ Tech read this to understand what is public static void main in java.

https://www.geeksforgeeks.org/understanding-public-static-void-mainstring-args-in-java/

Answer 2

rkk o... This happens to a beginner who has been treated with 'BlueJ' till now !!!😅

Answer 3

MJ Tech oh I got where you've went wrong.

The way we input values here is SOLOLEARN is different.

Input like this.
1
2
3
4
5
6
7
8
9
10

Answer 4

So in our case we have two arrays each of size 5.

Now we input something like
1
2
3
4
5
6
7
8
9
10

the compiler knows that 10 values are inputted and I have two array each of size 5,
so which mean
I have to distribute the 10 values equally to the arrays (10/2 = 5)
5 values each.

Answer 5

MJ Tech see this code

import java.util.*;

public class Program
{
public static void main(String[] args) {
/*
1
2
solo
learn
*/
Scanner ob = new Scanner(System.in);
int a = ob.nextInt();
int b = ob.nextInt();

String r = ob.next();
String s = ob.next();

System.out.println(a);
System.out.println(b);
System.out.println(r);
System.out.println(s);
}

/*
for something like this
a = 1,2,3 ; b = 4,5,6 ; c = 7,8,9,10

input like:
1
2
3
4
5
6
7
8
9
10
}

/*
rkk
So if there are 3 variables, a, b and c... and I want the values of them as: a = 1,2,3 ; b = 4,5,6 ; c = 7,8,9,10 ..then !!
And if there are four variables, two integer type, and two string type...how to ensure exactly what gets what? Also how to take the input, in this case??
*/

Answer 6

Again the same issue like in your previous question that is with this line public static void main(String args[])

Take my advise, revisit and revise your java course again.

Answer 7

MJ Tech you can do that by giving the values on commandline

Answer 8

MJ Tech Its the java programming language syntax and that's how the compiler understand something.

Read this...
https://www.geeksforgeeks.org/understanding-public-static-void-mainstring-args-in-java/

to clear your doubt.

Answer 9

I think in main() argument should be public static void main(String args[] ). Are you trying to do it on command line?

Answer 10

rkk hey!! Here I hav to take inputs...so why to write (String args [])

Answer 11

rkk but sir please understand I want the program to take inputs ... not pre-destined values!!!
So to take inputs we need to write
public static void main (input)

Answer 12

rkk what if I don't use the main method, use some other like 'accept' then ?

Answer 13

rkk Can you tell how will I take inputs in your modified program?
I entered " [1,2,3,4,5] and [6,7,8,9,10] in it and it showed ... Exception in thread "main".....

Answer 14

Oh!! rkk
But how will it understand which variable is taking what values !!

Answer 15

rkk
So if there are 3 variables, a, b and c... and I want the values of them as: a = 1,2,3 ; b = 4,5,6 ; c = 7,8,9,10 ..then !!
And if there are four variables, two integer type, and two string type...how to ensure exactly what gets what? Also how to take the input, in this case??

Answer 16

rkk ok thanks