Question

read in numbers into array , print out, sort - my program reads in and prints out but crashes before the sort - crashes after it prints out the scores - *important I have to use pointers!!!! c++

#include <iostream>

using namespace std;

void sortarray(int *tarray, int );
void displayarray(int *[], int);
void averageshowarray(int *[], int);

int main()
{
    int Size;
    int count;
    cout << "enter the size: " << endl;
    cin >> Size;

    int *valptr = new int[Size];

    for(count = 0; count < Size; count++)
    {
        cout << "Enter Test scores: " << endl;
        cin >> *(valptr + count);

    }
    for(count = 0; count < Size; count++)
    {
         cout << *(valptr + count) << endl;
    }

    //sort the array in order.
sortarray (valptr, Size);
    // display the test scores and average.
    //displayarray(valptr, Size);

    //averageshowarray(&valptr, Size);

    return 0;
}
void sortarray(int *b, int amount)
{
    int startscan, minindex;
    int *minelem;

    for(startscan = 0; startscan < (amount - 1); startscan++)
    {
        minindex = startscan;
        *minelem = b[startscan];
        for(int index = startscan + 1; index < amount; index++)
        {
            if((b[index]) < *minelem)
            {
               *minelem = b[startscan];
                b[startscan] = *minelem;
            }
        }
    }
}

Answer 1

Working c++ code:

#include <iostream>
using namespace std;
void sortarray(int *tarray, int );
void displayarray(int *[], int);
void averageshowarray(int *[], int);

void sortarray(int *b, int amount)
{

int startscan, minindex;
int *minelem;
for(startscan = 0; startscan <= (amount - 1); startscan++)
{
minindex = startscan;
minelem = &(b[startscan]);

for(int index = startscan + 1; index <= amount-1; index++)
{
if((b[index]) < *minelem)
{
minindex = index;
minelem = &(b[index]);
}
}
int tmp = b[startscan];
b[startscan] = *minelem;
b[minindex] = tmp;

}
cout << "Sorted Array is " << endl;
for(startscan = 0; startscan <= (amount - 1); startscan++)
{
cout << b[startscan] << endl;
}
}

int main()
{
int S;
int count;
cout << "enter the size: " << endl;
cin >> S;
int *valptr = new int[S];

for(count = 0; count < S; count++)
{
cout << "Enter Test scores: " << endl;
cin >> *(valptr + count);

}
cout << "Input Array is " << endl;

for(count = 0; count < S; count++)
{
cout << *(valptr + count) << endl;
}
//sort the array in order.
sortarray (valptr, S);
// display the test scores and average.
// displayarray(valptr, S);
//averageshowarray(&valptr, Size);

return 0;
}

Sample Output:

enter the size:
5
Enter Test scores:
2
Enter Test scores:
3
Enter Test scores:
1
Enter Test scores:
5
Enter Test scores:
4
Input Array is
2
3
1
5
4
Sorted Array is
1
2
3
4
5