Question

getting an error for the code below when attempting to compile . Not fully sure what the error means and confused why I am getting the error. I know there are a of other logical errors but im just looking for the solution to this specific one right now.

/tmp/ccq2rdty.o: In function `main':
IntArrayPlay.cpp:(.text+0x42): undefined reference to `fillArray(int*, int&)'
IntArrayPlay.cpp:(.text+0x55): undefined reference to `displayArray(int*, int&)'
IntArrayPlay.cpp:(.text+0x114): undefined reference to `displayArray(int*, int&)'
IntArrayPlay.cpp:(.text+0x15f): undefined reference to `displayArray(int*, int&)'
collect2: error: ld returned 1 exit status

/* Working with arrays and functions
* Author:
* Last modified on:
* Known bug
*/
#include <iostream>

using namespace std;

const int CAPACITY = 20;

// displayArray - display the array on a single line separated by blanks.
void displayArray(int array[], int& numElems);
// @param: int array[] is an unordered array of integers
// @param: int numElems
// [Already implemented]

//ToDo: Declare a function fillArray that fills an int array with values entered
void fillArray(int array[], int& numElems);
// by the user. Stop reading when the user inputs -1 or you reach CAPACITY.
// @param: int array[] is an unordered array of integers when leaving this function
// @param: int& numberElements is the number of Elements in the array after function
// @returns void.

//ToDo: Declare a function that removes (i.e., deletes) the element
void deleteElement(int array[], int& numElems, int& target);
// removeElement - removes the element of the given index from the given array.
// @param: int array[] is an unordered array of integers
// @param: int numberElements
// @param: int position of element to delete
// @returns: true if delete was successful, false otherwise

//ToDo: Delcare a function that inserts the element in the given position
void insertElement(int array[], int& numElems, int& pos, int& target);
// insertElement - removes the element of the given index from the given array.
// @param: int array[] is an unordered array of integers
// @param: int numberElements
// @param: int position to insert into
// @param: int target to insert.
// @returns: true if insert was successful, false otherwise

//ToDo: Declare a function that searches for an element in the given array
bool searchElement(int array[], int& numElems, int searchval);
// searchElement - searches for the element in the given array.
// @param int array[] is an unordered array of integers
// @param int numberOfElements
// @param int target
// @returns index of element or -1 if not found.

int main()
{
// The NumArray can be partially filled, we use variable NumArrayElems to keep track of how many numbers
// have been stored in the array.
int array[CAPACITY];   // an int array with a given CAPACITY
int numElems = 0; // the array is initially empty
int searchval = 0;
int pos = 0;
int target = 0;

// 1. ToDo: Call your fillArray function to read in a sequence of integer values,
// separated by space, and ending with -1. Store the values in the NumArray array
fillArray(array, numElems);
  
// and the number of elements in NumArrayElems.
// Display the contents of the array afterwards
displayArray(array, numElems);

// 2. ToDo: Read in a value and position from the user. Call your insertElement function
cout << "Enter a value and a position to insert: ";
cin >> target >> pos;
  
// to insert the given value into the given position of the array
insertElement(array, numElems, pos, target);
// Display the contents of the array afterwards

// 3. ToDo: Read in a value and call your searchElement function
cout << "Please enter the value you would like to search: ";
cin >> searchval;
  
//searchElement(array, numElems, searchval);
// if the value is found, delete it from the array using your function
if (searchElement(array, numElems, searchval) == true)
deleteElement(array, numElems, pos);
  
else
cout << "Value not found!";
// if the value not found, print "Value not found in array"
  
  
// Display the contents of the array afterwards
displayArray(array, numElems);

// 5. TODO: Read in a value and call your insertElement function to append
cout << "Enter a value to append: ";
cin >> target;
  
insertElement(array, numElems, pos, target);
// a value to the end of the array
// Display the contents of the array afterwards
displayArray(array, numElems);
  
return 0;
}

//TODO: Implement all functions declared above.
//Don't forget to put precondition/postcondition comments under or over the function header.

// displayArray - displays the array
// precondition: int array[] is an unordered array of numElems integers.
// postcondition: array is displayed on the console on a single line separated by blanks.

void fillArray(int array[], double& numElems)
{
cout << "Please enter up to 20 non-negative whole numbers separated by space.\n" << "Mark the end of the input list with a negative number: \n";
int num;
int index;
cin >> num;
  
while (num >= 0 && index < CAPACITY)
{
array[index] = num;
index++;
cin >> num;
numElems = index;
}
}

void displayArray(int array[], int numElems)
{
for (int i = 0; i < numElems; i++)
cout << array[i] << " ";
cout << endl;
}

bool searchElement(int array[], int& numElems, int searchval)
{
bool result = false;
  
cout << "Enter a value to delete from the array: ";
cin >> searchval;
  
for(int i = 0; i < numElems; i++)
{
if (array[i] == searchval)
result = true;
}

return result;
}

void insertElement(int array[], int& numElems, int& pos, int& target)
{
for(int i = pos; i < numElems + 1; i++)
{
array[i+1] = array[i];
array[pos] = target;
}

}

void deleteElement(int array[], int& numElems, int& target)
{
int index = 0;
for(int i = 0; i < numElems; i++)
{
if(array[i] == target)
{
index = i;
for(int j = index; j < numElems; j++)
array[j] = array[j+1];

}
  
}

}

Answer 1

If you have any doubts, please give me comment...

/* Working with arrays and functions

* Author:

* Last modified on:

* Known bug

*/

#include <iostream>

using namespace std;

const int CAPACITY = 20;

// displayArray - display the array on a single line separated by blanks.

void displayArray(int array[], int numElems);

// @param: int array[] is an unordered array of integers

// @param: int numElems

// [Already implemented]

//ToDo: Declare a function fillArray that fills an int array with values entered

void fillArray(int array[], int &numElems);

// by the user. Stop reading when the user inputs -1 or you reach CAPACITY.

// @param: int array[] is an unordered array of integers when leaving this function

// @param: int& numberElements is the number of Elements in the array after function

// @returns void.

//ToDo: Declare a function that removes (i.e., deletes) the element

void deleteElement(int array[], int &numElems, int target);

// removeElement - removes the element of the given index from the given array.

// @param: int array[] is an unordered array of integers

// @param: int numberElements

// @param: int position of element to delete

// @returns: true if delete was successful, false otherwise

//ToDo: Delcare a function that inserts the element in the given position

void insertElement(int array[], int &numElems, int pos, int target);

// insertElement - removes the element of the given index from the given array.

// @param: int array[] is an unordered array of integers

// @param: int numberElements

// @param: int position to insert into

// @param: int target to insert.

// @returns: true if insert was successful, false otherwise

//ToDo: Declare a function that searches for an element in the given array

bool searchElement(int array[], int numElems, int searchval);

// searchElement - searches for the element in the given array.

// @param int array[] is an unordered array of integers

// @param int numberOfElements

// @param int target

// @returns index of element or -1 if not found.

int main()

{

    // The NumArray can be partially filled, we use variable NumArrayElems to keep track of how many numbers

    // have been stored in the array.

    int array[CAPACITY]; // an int array with a given CAPACITY

    int numElems = 0;    // the array is initially empty

    int searchval = 0;

    int pos = 0;

    int target = 0;

    // 1. ToDo: Call your fillArray function to read in a sequence of integer values,

    // separated by space, and ending with -1. Store the values in the NumArray array

    fillArray(array, numElems);

    // and the number of elements in NumArrayElems.

    // Display the contents of the array afterwards

    displayArray(array, numElems);

    // 2. ToDo: Read in a value and position from the user. Call your insertElement function

    cout << "Enter a value and a position to insert: ";

    cin >> target >> pos;

    // to insert the given value into the given position of the array

    insertElement(array, numElems, pos, target);

    // Display the contents of the array afterwards

    // 3. ToDo: Read in a value and call your searchElement function

    cout << "Please enter the value you would like to search and delete: ";

    cin >> searchval;

    //searchElement(array, numElems, searchval);

    // if the value is found, delete it from the array using your function

    if (searchElement(array, numElems, searchval) == true)

        deleteElement(array, numElems, searchval);

    else

        cout << "Value not found!";

    // if the value not found, print "Value not found in array"

    // Display the contents of the array afterwards

    displayArray(array, numElems);

    // 5. TODO: Read in a value and call your insertElement function to append

    cout << "Enter a value to append: ";

    cin >> target;

    pos = numElems;

    insertElement(array, numElems, pos, target);

    // a value to the end of the array

    // Display the contents of the array afterwards

    displayArray(array, numElems);

    return 0;

}

//TODO: Implement all functions declared above.

//Don't forget to put precondition/postcondition comments under or over the function header.

// displayArray - displays the array

// precondition: int array[] is an unordered array of numElems integers.

// postcondition: array is displayed on the console on a single line separated by blanks.

void fillArray(int array[], int &numElems)

{

    cout << "Please enter up to 20 non-negative whole numbers separated by space.\n"

         << "Mark the end of the input list with a negative number: \n";

    int num;

    int index;

    cin >> num;

    while (num >= 0 && index < CAPACITY)

    {

        array[index] = num;

        index++;

        cin >> num;

        numElems = index;

    }

}

void displayArray(int array[], int numElems)

{

    for (int i = 0; i < numElems; i++)

        cout << array[i] << " ";

    cout << endl;

}

bool searchElement(int array[], int numElems, int searchval)

{

    bool result = false;

    for (int i = 0; i < numElems; i++)

    {

        if (array[i] == searchval)

            result = true;

    }

    return result;

}

void insertElement(int array[], int &numElems, int pos, int target)

{

    for (int i = numElems; i>pos; i--)

    {

        array[i] = array[i-1];

    }

    array[pos] = target;

    numElems++;

}

void deleteElement(int array[], int &numElems, int target)

{

    int index = 0;

    for (int i = 0; i < numElems; i++)

    {

        if (array[i] == target)

        {

            index = i;

            for (int j = index; j < numElems-1; j++)

                array[j] = array[j + 1];

            numElems--;

        }

    }

}