Creating a dynamic array for a structure

[Depressed]

I would appreciate some advice in creating a dynamic array for my structure so I can manually choose how many students I want to input data for. Here is what I have so far.

#include<iostream>
#include<iomanip>
#include<cmath>
#include <cstring>
#include <cctype>
#include <cstdlib>

using namespace std;

const int NUM_TESTS = 4;
const int SIZE = 40;

struct studentInfo
{
    char studentName[SIZE];
    char idNum[SIZE];
    char testScores[NUM_TESTS];
    double average;
    char grade;
};

void getInfo(studentInfo [], int);
void showInfo(studentInfo [], int);

int main()
{
    double *ARRAY_SIZE = nullptr;   //Local double pointer to dynamically allocate an array
    int dynamic = 0;

    cout << "          Course Grade Program" << endl;
    cout << "========================================\n" << endl;
    cout << "How many students: ";
    cin >> dynamic;

    ARRAY_SIZE = new double[dynamic];  //Dynamically allocates an array large enough to hold both strings and names

    studentInfo student[ARRAY_SIZE];

    getInfo(student,ARRAY_SIZE);
    showInfo(student,ARRAY_SIZE);

    delete [] ARRAY_SIZE;    //Deallocates array
    ARRAY_SIZE = nullptr;   //Makes ARRAY_SIZE a null pointer

    return 0;
}

void getInfo(studentInfo prGroup[], int size)
{
    studentInfo* ptr;
    int index = 0;
    int testScore = 0;
    int convert;

    for(ptr = prGroup; ptr < &prGroup[size]; ptr++)
    {
        cout << "Student name#" << index + 1 << ": ";
        cin.getline(ptr->studentName, SIZE);

        cout << "ID Number: ";
        cin.getline(ptr->idNum, SIZE);

        for(int numCount = 0; numCount < NUM_TESTS; numCount++)
        {
            cout << "      Test #" << numCount + 1 << ": ";
            cin.getline (ptr->testScores, NUM_TESTS);

            int e = atoi(ptr->testScores);
            ptr->average += e/2;

            /*if(ptr->grade >= 91 || ptr->grade <= 100)
            {
                ptr->grade = 'A';
            }
            if(ptr->grade >= 91 || ptr->grade <= 90)
            {
                ptr->grade = 'B';
            }
            if(ptr->grade >= 71 || ptr->grade <= 80)
            {
                ptr->grade = 'C';
            }
            if(ptr->grade >= 61 || ptr->grade <= 70)
            {
                ptr->grade = 'D';
            } */
        }
        cout << endl;

        index++;
    }
}

void showInfo(studentInfo prGroup[], int size)
{
        studentInfo* ptr;

        // Prints ID number, name, and salary for 5 programmers.
        cout << "------ Course Grade Report: --------------\n";
        // for(int index = 0; index < MAX_PROG; index++)
        for(ptr = prGroup; ptr < &prGroup[size]; ptr++)
        {
        cout << "Student Name: " << ptr->studentName << endl;
        cout << "ID Number: "  << ptr->idNum << endl;
        cout << "Average Test Score: " << ptr->average <<  endl;
        cout << "Grade: " << ptr->grade << endl;
        cout << "-------------------------------------------------\n";
        }
}

[keskiverto]

I might have answered in your other thread: http://www.cplusplus.com/forum/beginner/268899/

[Depressed]

Will check it out thx