I'm not sure what I'm doing wrong. I get a warning when I compile and an error after my program runs.
This is the warning I get:
myList2.cpp: In function ‘int main()’:
myList2.cpp:96: warning: deleting array ‘int score [6]’

And this is what shows after my program runs:
a.out(7023) malloc: *** error for object 0x7fff6bae4bf0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort trap: 6

And this is my code:

#include <string>
#include <iostream>
using namespace std;

double getAverage(int* score, int n)
{
    int sum = 0;
    int c = 0;
    for (c = 0; c < n; c++)
        sum += score[c];
    double average = double(sum) / n;
    return average;
}

int compare(const void* pa, const void* pb)
  {
  const int& a = *static_cast<const int*>(pa);
  const int& b = *static_cast<const int*>(pb);
  if (a < b) return -1; // negative if a<b
  if (a > b) return 1; // positive if a>b
  return 0; // 0 for tie
  }

bool hasAScore(int size,int score[])
{
    int d;
    for (d=0; d < size; d++)
    {
        if (score[d] >= 90)
        {
            cout << "At least one 'A' grade is present" << endl;
            return true;
        }
    }
    cout << "No A grades present" << endl;
    return false;
}
int main()
{ 
  // create empty list
  const int MAX_SCORES = 6;
  int nScores = 0;
  int score[MAX_SCORES];

  // user input for amount of scores
  int size;
  cout << "How many scores? ";
  cin >> size;
  cin.ignore(1000, 10);
  int* scoreOne = new int[size];

  // read and save the scores
  int i;
  int aScore;
  for (i = 0; i < size; i++)
  {
    cout << "Enter the number: ";
    cin >> aScore;
    cin.ignore(1000, 10);

    if (nScores < MAX_SCORES)
        score[nScores++] = aScore;
  } // for

  // find the max and min integers
  int max = score[0];
  int min = score[0];
  int b;
  for (b = 1; b < size; b++)
  {
    if (max < score[b]) max = score[b];
    if (min > score[b]) min = score[b];
  } // for

  qsort(score, nScores, sizeof(int), compare);

  // printing the values
  for (i = 0; i < size; i++)
    cout << score[i] << ' ';
    cout << endl;
    cout << "Maximum: " << max << endl;
    cout << "Minimum: " << min << endl;
    cout << "Average = " << getAverage(score,size) << endl;
    hasAScore(size,score);
  delete [] score;

  cout << "Press ENTER to continue..." << endl;
  cin.get();

  return 0;
}

you can not delete arrays or other objects that were not allocated with new. All you have to do is delete line 85 because its not needed.

This question has already been answered. Start a new discussion instead.