# (Homework Solution): Question 4 (a) Write a C++ statement to create an array of 20 integers called

Question 4 (a) Write a C++ statement to create an array of 20 integers called myArray or [2 marks] (b) You have two pointers to dynamically allocated arrays original and copy and the Stack. the following code is run: copyoriginal; Will the two arrays contain the same values? Explain. [2 marks] (c) Write a function to merge two arrays. The function signature is int *merge (int *arrayl, int size1, int *array 2, int size2) The function should return a pointer to a new array which contains the values of arrayl of length sizel followed by array2 of length size2. You can assume that the array lengths are both greater than 0 and that no errors can occur. [6 marks]

4) a) To create an array on the stack, do not use dynamic memory allocation or the word new.

int myArray[20];

will create an array on stack.

b) The two pointers point to different arrays which are dynamically allocated. When copy = original is executed, the copy will point to original array itself.

Since both point to the same array, the contents of both the arrays will be same.

c) Code for function

int *merge(int *array1,int size1,int *array2,int size2)

{

//Size of new array is sum of the two sizes

int *merge_array = new int[size1+size2];

int i=0,j=0;

while(i<=size1+size2-1)

{

//If i is below size1 copy array1 elements

if(i<size1)

merge_array[i] = array1[i];

else {

//After array1 is copied copy elements of array2

merge_array[i] = array2[j];

j++;

}

//Increment loop counter

i++;

}

//Display array

//for(int i =0;i<=size1+size2-1;i++)

// cout<<merge_array[i]<<endl;

//Return array

return merge_array;

}

Sample output:

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