Thread: new to c++

so i'm new to c++ and tying to write a program that will hold test scores then they have to be arrange in ascending order and average them all tighter at then end. I got this far and keep getting an error of cannot convert parameter 1 from int to int* for "showAverage". I am not sure what is wrong please help!

Code:

//This program will hold a user-defined number of test scores
//Then it will sort them in ascending order and average them.
#include <iostream>
using namespace std;


//function prototype
void arrSelectSort (int *, int);
void showAverage (int *, int);
void showArrPtr (int *, int);


int main()
{
    int *scores,                //to dynamically allocate an array
        average,                //to hold the average test score
        total=0,                //accumulator
         numTest,                //to hold the number of test scores
        count;                    //counter variable


    //get the number of test scores.
    cout <<"Test Scores" << endl;
    cout << "How many test scores do you need to average? ";
    cin >> numTest;


    //dinamically allocate an array large enough to hold that many test scores.
    scores=new int [numTest];


    //get the test score
    cout <<"Enter the test scores to be average: " <<endl;
    for (count=0; count<numTest; count++)
    {
        cout<<"Test " << (count+1) << " : ";
        cin >> scores [count];
        //do not accept negative test scores numbers
        while (scores <0)
        {
            cout <<"Enter a number greater than 0";
            cin >> scores [count];
        }
    }
    //calculate the total scores together
    for (count=0; count<numTest; count++)
    {
        total+=scores[count];
    }


    //sort the elements of the array of pointers
    arrSelectSort(scores, scores[count]);


    //display the test scores in ascending order
    cout<<"The test scores in ascending order are: " << endl;
    showArrPtr (scores,scores[count]);


    //display the average test score
    showAverage (total, numTest);


    //free allocated memory
    delete [] scores;
    scores=0;                    //make scores point to null.


    return 0;
}
//******************************************************
//definition of function showAverage
//this funtion displays the average number of test scores
//***************************************************


void showAverage (int total, int numTest)
{
    int average;
    //calculate the average
    average=total/numTest;
    //display the results.
    cout<<"Average Score: "<<average<<endl;
}




//**************************************************
//definition of function arrSelectSort
//this funtion will perform the ascending order selection sort
//*****************************************************


void arrSelectSort (int *arr[], int size)
{
    int startScan;
    int minIndex;
    int *minElem;


    for (startScan=0; startScan<(size-1); startScan++)
    {
        minIndex=startScan;
        minElem=arr[startScan];
        for (int index= startScan + 1; index <size; index++)
        {
            if (*(arr[index])<*minElem)
            {
                minElem=arr[index];
                minIndex=index;
            }
        }
        arr[minIndex] = arr[startScan];
        arr[startScan] = minElem;
    }
}
//*******************************************************
//definition of function showArrayPtr
//this function displays the contents of the array pointed to by arr
//*********************************************************


void showArrPtr (int *arr[], int size)
{
    for (int count=0; count <size; count++)
        cout<<*(arr[count])<<" ";
        cout<<endl;
}

> void showAverage (int *, int);
vs
> void showAverage (int total, int numTest)

Tip: Write the empty function first, then copy/paste it to make the prototype.

Make scores a std::vector instead. See std::vector - cppreference.com.
Your functions are accepting an array of pointers. Your score in not an array of pointers. It's a dynamic array. You need to fix that.

Code:

//This program will hold a user-defined number of test scores
//Then it will sort them in ascending order and average them.
#include <iostream>
#include <vector>

//get out of the habbit of "using namespace std;"
using std::cin;
using std::cout;
using std::endl;




 
void arrSelectSort (int *, int);
double showAverage (std::vector<double>&);
void showArrPtr (std::vector<double>&);
 


int main()
{
    double grade,
    numTest,                //to hold the number of test scores
    count;                    //counter variable
    std::vector<double>scores;
    
    //get the number of test scores.
    cout <<"Test Scores" << endl;
    cout << "How many test scores do you need to average? ";
    cin >> numTest;

    //get the test score
    cout <<"Enter the test scores to be average: " <<endl;
    while (count <= numTest)
    {
        cin>>grade;
        if (grade>=101)
        {
            cout<<"Come on grades cannot be greater then 100%\n";
            cin.ignore();
        }
        scores.push_back(grade);
        count++;
    }
   
    //sorting the vector
    std::sort(scores.begin(), scores.end());
    
    //display the test scores in ascending order
    cout<<"The test scores in ascending order are: " << endl;
    showArrPtr (scores);
    
    //display the average test score
    cout<<"The average is: "<<showAverage (scores);
    
    return 0;
}
//******************************************************
//definition of function showAverage
//this funtion displays the average number of test scores
//***************************************************


double showAverage (std::vector<double>&v)
{
    double average=0;
    int count =0;
    for (auto it=v.begin() ; it!=v.end(); ++it)
    {
        average += *it;
        count++;
    }
    average = average / count;
    
    return average;
}


//*******************************************************
//definition of function showArrayPtr
//this function displays the contents of the array pointed to by arr
//*********************************************************


void showArrPtr (std::vector<double>& v)
{
    for (auto it=v.begin(); it!=v.end(); ++it)
    {
        cout<<*it<<"\n";
    }
}

Consider something like this... Look more into vectors and passing by reference.