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POChanging around arrays
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copied!<p>I'm doing a lot of different things with manipulating arrays without vectors, I was wondering if any one could help me with shifting elements in an array and expanding an array while initializing the new space with elements. I feel like I'm very close to completing this code, but I'm hitting a block.</p> <pre><code>#include <iostream> using namespace std; // Function prototypes int *reverse(int *, int); int *expand(int *, int); int *shift(int *, int); void display(int[], int); void display2(int[], int); void display3(int[], int); int main() { int const SIZE = 5; int myArray [SIZE] = {1, 2, 3, 4, 5}; int myArray2 [SIZE] = {1, 2, 3, 4, 5}; int myArray3 [SIZE] = {1, 2, 3, 4, 5}; int *arraPtr; int *arraPtr2; int *arraPtr3; arraPtr = reverse(myArray, SIZE); display(myArray, SIZE); arraPtr2 = expand(myArray2, SIZE); display2(myArray2, SIZE); arraPtr3 = shift(myArray3, SIZE); display3(myArray3, SIZE); delete [] arraPtr; delete [] arraPtr2; delete [] arraPtr3; return 0; } int *reverse(int *arr, int size) { int *copyArray; int posChange; if( size < 0) return NULL; copyArray = new int[size]; for (int index = 0; index < --size; index++) { posChange = arr[index]; arr[index] = arr[size]; arr[size] = posChange; } return copyArray; } int *expand(int *arr, int size) { int *newArray; newArray = new int[size * 2]; memcpy( newArray, arr, size * sizeof(int)); for (int index = size; index < (size*2); index++) newArray[index] = 0; return newArray; } int *shift(int *arr, int size) { int *newArray; newArray = arr; newArray = new int [size + 1]; for (int index = 5; index > 0; index--) newArray[index] = newArray[index - 1]; return newArray; } void display(int arr[], int size) { for (int index = 0; index < size; index++) { cout << arr[index] << " "; } cout << endl; } void display2(int arr[], int size) { for (int index = 0; index < size; index++) { cout << arr[index] << " "; } cout << endl; } void display3(int arr[], int size) { for (int index = 0; index < size; index++) { cout <<arr[index] << " "; } cout << endl; } </code></pre>

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