Getting arrays and changing them.

[sabian4k]

hey guys i'm stuck big time, i need some major help.

// *************************************************************

//  This program adds large integers that are stored in arrays.
//  The digits are stored in the array in reverse order so that
//  addition is easier.  The program allows a user to keep doing 
//  more additions as long as he/she wishes.
//
// *************************************************************

#include <iostream>
#include <cctype>

using namespace std;

typedef int* IntArrayPtr;

void inputBigInt (IntArrayPtr &a, int& sizeA);
// Precondition: The user is ready to enter an integer
// Postcondition: The digits of the integer read in are stored
// in reverse order in the array a and the number of digits is 
// stored in sizeA. Array a will have been dynamically allocated


void outputBigInt(IntArrayPtr a, int sizeA);
// Precondition: a is defined
// Postcondition: The integer represented by a has been output.


void add (IntArrayPtr a, int sizeA, IntArrayPtr b, int sizeB, 
         int& sizeSum);
// Precondition: Parameters a, sizeA, b and sizeB have values.
// Postcondition: The parameter sum contains the sum of the
// integers represented by a and b and sizeSum contains the number of
// digits in the sum. Array sum will have been dynamically allocated.


// ========================
//      main function
// ========================
int main()
{
    IntArrayPtr a;
    IntArrayPtr b;
    IntArrayPtr sum;
    int sizeA, sizeB, sizeSum;
    char goAgain;   // loop control

    cout << endl;
    cout << "Addition of big integers" << endl << endl;

    do {
        //
        // Get two big integers
        //
        inputBigInt(a, sizeA);
        inputBigInt (b, sizeB);

        //
        // Find the sum and print the result
        //
        add (a, sizeA, b, sizeB, sum, sizeSum);
        cout << "The sum of ";
        outputBigInt(a, sizeA);
        cout << " and ";
        outputBigInt(b, sizeB);
        cout << " is ";

        outputBigInt (sum, sizeSum);
        cout << endl << endl;
        cout << "Add two more? (y or n): ";
 
        //
        // Release the memory
        //
        delete[] a;
        delete[] b;
        delete[] sum;

        cin >> goAgain;
    }
    while (goAgain == 'y' || goAgain == 'Y');

    return 0;
}


// =================================
//       Function definitions
// =================================
void outputBigInt (IntArrayPtr a, int sizeA)
{
    //
    // Print the digits in reverse order 
    //
    for (int i = 0; i < sizeA; i++)
        cout << a[sizeA - i - 1];
}


	// --------------------------------
	// ----- ENTER YOUR CODE HERE -----
	// --------------------------------
// Precondition: The user is ready to enter an integer
// Postcondition: The digits of the integer read in are stored
// in reverse order in the array a and the number of digits is 
// stored in sizeA. Array a will have been dynamically allocated
void inputBigInt (IntArrayPtr &a, int& sizeA){
     cout << "Please input a number that is less than 20 intergers to be" << endl;
          << "added."<< endl;
     cin >> [a];
     }

	// --------------------------------
	// --------- END USER CODE --------
	// --------------------------------

and I promise i'm really not trying to be lazy. my grade relies on this program so please help me guys. thank you so much. i'll send you guys cookies for REAL!

[Salem]

> delete[] a;
And new is called where?

[sabian4k]

everything not written in Enter Code was pre-written. so I have to write the code in enter your code here area.

[Salem]

I see that, but you didn't answer my question.

But if that's the case, you've done bugger all with regard to "and I promise i'm really not trying to be lazy. my grade relies on this program so please help me guys"

[sabian4k]

okay so i need to create a new array* = (something here) in the inputBigInt function right?

[sabian4k]

int* a = new int[a];

[sabian4k]

how do i change an int array to a char array?

[sabian4k]

and how do i take in the number in that function?

[Salem]

Read a book and apply yourself to the problem.

Don't just keep posting one-liner's with random guesses of syntax in the hope that we'll say something more concrete.

This is basic stuff, and you haven't even got to the "hard" (for you) part yet.