1) a) Give C++ code for dynamically declaring and allcoating a 5 by 7 array of i

Question

1) a) Give C++ code for dynamically declaring and allcoating a 5 by 7 array of intergers using the new operator b) Give the C++ code for deallocating the array allocated in part a 1) a) Give C++ code for dynamically declaring and allcoating a 5 by 7 array of intergers using the new operator b) Give the C++ code for deallocating the array allocated in part a a) Give C++ code for dynamically declaring and allcoating a 5 by 7 array of intergers using the new operator b) Give the C++ code for deallocating the array allocated in part a b) Give the C++ code for deallocating the array allocated in part a b) Give the C++ code for deallocating the array allocated in part a

Explanation / Answer

1a) For declaring and allocating a 2D array of integers, a double pointer of integer needs to created and using new allocated with a pointer array whose size is number of rows. Then using another new, a pointer of size as number of columns need to be allocated for each of the row pointers

int **array = new int*[5];

for(int i = 0; i < 5; i++) {

array[i] = new int[7];

}

b) For deallocating a 2D dynamically allocated array, deallocate each row using delete keyword. After that deallocate the array

for(int i = 0; i < 5; i++) {

delete [] array[i];

}

delete [] array;

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