more info on my question, ADDING LARGE INTEGERS, in java arrays

[johnathan]

I need help in writing the addition , subtraction etc. method.

eample the add method must add large intergers,
say 2500 + 69587562. each number is entered in the subscript individually.


this is what i have done so far.I created the class,construct ors


public class Example
{
private int[] values;
private int min;
private int max;


Scanner Key= new Scanner(System. in);

public Example()
{
values=20;
min=0;
max=20;
}

public int ReadSize( int size)
{

System.out.prin tln("Enter the size of the array.")
size=key.nextIn t();

for(int min=0; min<size.length ;min ++)
{
values[min]=key.nextInt();
}
}

[johnathan]

could u wirte a method for me to see what it would look like, doing it the "FAIR method. thanks

[r035198x]

could u wirte a method for me to see what it would look like, doing it the "FAIR method. thanks

should look something like this. I have to go for now but you should make the neccessary changes to your code to make this compile and then try to fine tune it to get the correct results. I 'll be in tommorrow morning about 8 hrs from now but others may be able to help you before then

public LargeInteger add(LargeInteger num) {
        int size = num.getMax() > getMax() ? num.getMax(): getMax();
        LargeInteger result = new LargeInteger(size + 1);
 
        for(int i = 0; i < size; i++) {
            int resultPos = size;
            int carry = 0;
            int numPos = num.getMax();
            int thisPos = number.getMax();
            int unit = 0;
            int sum = carry + num.getDigit(numPos) + number.getDigit(thisPos);
            if(sum > 10) {
                unit = sum - 10;
                carry = 1;
            }
            else {
                carry = 0;
                unit = sum;
            }
            result.setDigit(unit, resultPos);
            resultPos = resultPos - 1;
            numPos = numPos - 1;
            thisPos = thisPos - 1;
        }
        return result;
 
 
 
    }

[johnathan]

this is what the program look like.

public class Quest
{
public static void main(String []args)
{

example test= new example (5);
example test2= new example(6);

example test3= new example(7);

test.readinfo() ;
test.printnum() ;

test2.readinfo( );
test2.printnum( );

test3.add(test, test2);



this is the class that i have so far. would u kindly help with the addition
subtraction methods. sorry am going to copy and paste this here.




public class example
{
private int [] values;


public example ()
{
values= new int[40];

}

public example(int size)
{
values=new int [size];
}

public void readinfo()
{
int ctr=0;
String asknum=JOptionP ane.showInputDi alog("Enter the numbers.");

for( int i=asknum.length () -1; i >=0; i--)
{
values [ctr]=asknum.charAt( i)-48;
ctr ++;
}
}

public void printnum()
{
for(int i=0; i<values.length ; i ++)
{
JOptionPane.sho wMessageDialog( null,"Display the numbers." + values[i]);

}
}

public void add( )
{

[r035198x]

this is what the program look like.

public class Quest
{
public static void main(String []args)
{

example test= new example (5);
example test2= new example(6);

example test3= new example(7);

test.readinfo() ;
test.printnum() ;

test2.readinfo( );
test2.printnum( );

test3.add(test, test2);



this is the class that i have so far. would u kindly help with the addition
subtraction methods. sorry am going to copy and paste this here.




public class example
{
private int [] values;


public example ()
{
values= new int[40];

}

public example(int size)
{
values=new int [size];
}

public void readinfo()
{
int ctr=0;
String asknum=JOptionP ane.showInputDi alog("Enter the numbers.");

for( int i=asknum.length () -1; i >=0; i--)
{
values [ctr]=asknum.charAt( i)-48;
ctr ++;
}
}

public void printnum()
{
for(int i=0; i<values.length ; i ++)
{
JOptionPane.sho wMessageDialog( null,"Display the numbers." + values[i]);

}
}

public void add( )
{

Are we still going the right direction here?

[johnathan]

am sorry, but i am.
that is what i came up with for the read statement, now following that i need help in the addition method, note please take a look at the program also.

[johnathan]

i need hepl with the addition and subtraction method.above you will see what i did so far.

also how do you declare a class within a class method. example.
the program would be:

example test=new example()
example test2=new example()
example test3=new example()

test.readinfo() ;
test2.readinfo( )
test3(test,test 2) HOW IS THIS REPRESENTED INT THE CLASS METHOD

public void add( WHAT GOES IN HERE)



THANKS FOR HELPING.

[johnathan]

Is This Correct.



public void add( examplexx a, examplexx b)
{
int carry=0;
int sum=0;

for(int i=0; i<values.length ; i ++)
{
sum=carry + values.length + values.length;


if( sum >=10)
{
sum= sum-10;
carry =1;
}
else
{
carry =0;
}

}
JOptionPane.sho wMessageDialog( null, "The final sum is . " + sum);
}

[r035198x]

Is This Correct.



public void add( examplexx a, examplexx b)
{
int carry=0;
int sum=0;

for(int i=0; i<values.length ; i ++)
{
sum=carry + values.length + values.length;


if( sum >=10)
{
sum= sum-10;
carry =1;
}
else
{
carry =0;
}

}
JOptionPane.sho wMessageDialog( null, "The final sum is . " + sum);
}

All I can say is this depends on where the method is. If the method is the number class (which in this case is examplexx?) then the method signature should be

public examplexx add(examplexx a)

. This is how I think you should be doing it as you could tell for my draft method for add that I did above(If you looked at it).

Now your method is taking in two objects a and b and doing absolutely nothing with them?

[r035198x]

Needless for me to point out that values is not defined in your method and so the method will not compile anyway.