Question

C++, Will Upvote:

A) Try to get the following programs to run in your environment.

B) If the programs will run, document each line of code with comments and describe any changes you had to make to the original code to get it to work. If the programs are unable to be modified to run with desirable results, explain why you think so.

C) Description your solution and a synopsis of how your code is intended to work and the tests that you created to prove that it works as intended.

//CODE A:

#include <iostream>

using namespace std;

int* reverse(const int* list, int size)
{
  int result[6];

  for (int i = 0, j = size - 1; i < size; i++, j--)
  {
    result[j] = list[i];
  }
  return result;
}

void printArray(const int* list, int size)
{
  for (int i = 0; i < size; i++)
    cout << list[i] << " ";
}

int main()
{
  int list[] = {1, 2, 3, 4, 5, 6};
  printArray(list, 6);
  cout << endl;
  int* p = reverse(list, 6);
  printArray(p, 6);
  cout << endl;

  return 0;
}

---------------------------------------------

//CODE B:

#include <iostream>
using namespace std;

int* reverse(const int* list, int size)
{
  int* result = new int[size];

  for (int i = 0, j = size - 1; i < size; i++, j--)
  {
    result[j] = list[i];
  }
  return result;
}

void printArray(const int* list, int size)
{
  for (int i = 0; i < size; i++)
    cout << list[i] << " ";
}

int main()
{
  int list[] = {1, 2, 3, 4, 5, 6};
  printArray(list, 6);
  cout << endl;
  int* p = reverse(list, 6);
  printArray(p, 6);
  cout << endl;

  return 0;
}

Answer 1

#include <iostream>

using namespace std;

int* reverse(const int* list, int size)
{
static int result[6]; // issues is with this as we are returning the address of this variale we need to make it as
// static because we can not return the address of local variables because they
// will get destroyed once this function is completed

// looping through array to reverse the array
for (int i = 0, j = size - 1; i < size; i++, j--)
{
result[i] = list[j];
}
// returning the reverse of the array
return result;
}
// prints the array
void printArray(int* list, int size)
{
// loop thorugh the array and print
for (int i = 0; i < size; i++)
cout << list[i] << " ";
}

int main()
{
// creating int array with elements 6
int list[] = {1, 2, 3, 4, 5, 6};
// calling printArray to print elements
printArray(list, 6);
// newline printing
cout << endl;
// calling reverse() to reverse the array
int * p = reverse(list, 6);
// again printing the array
printArray(p, 6);
cout << endl;

return 0;
}

#include <iostream>
using namespace std;

int* reverse(const int* list, int size)
{
// here we are creating the array dynamically so that we can return the address
// because if we create arrays dynamically they will not destroy until program ends
int* result = new int[size];

for (int i = 0, j = size - 1; i < size; i++, j--)
{
result[j] = list[i];
}
return result;
}
// prints the array
void printArray(int* list, int size)
{
// loop thorugh the array and print
for (int i = 0; i < size; i++)
cout << list[i] << " ";
}

int main()
{
// creating int array with elements 6
int list[] = {1, 2, 3, 4, 5, 6};
// calling printArray to print elements
printArray(list, 6);
// newline printing
cout << endl;
// calling reverse() to reverse the array
int * p = reverse(list, 6);
// again printing the array
printArray(p, 6);
cout << endl;

return 0;
}

This solution to reverse the given array elements into the new array and return from the function