Need help with this program! Arrays and functions

[ResidentBiscuit]

Hi, so basically this program just takes an array of user input and sorts the numbers in ascending order, then it passes this array to a function that will display the average of this array. It is a very small array, but I am running into an error in the average function if someone could assist here that would be great. I feel like I am so close to finishing this.

#include <iostream>
#include <string>
#include <iomanip>

using std::cout;
using std::cin;
using std::endl;
using std::string;
using std::fixed;
using std::setprecision;

void sortArray();
void displayAverage(int []);

int main()
{
	cout << "Hi there, I will be taking whatever numbers you give me and I will sort them in ascending order and also give you the average!" << endl << endl;
	sortArray();

	return 0;
}	//end of main function



//start of sort function
void sortArray()
{
	int num[5]   = {0, 0, 0, 0, 0};
	int x        = 0;	    //keeps track of subscripts
	int temp     = 0;       //variable used for swapping
	int maxSub   = 4;       //maximum subscript
	int lastSwap = 0;       //indicates position of last swap
	char swap    = 'Y';     //indicates whether a swap was made

	//take input for num[x]
	cout << "Please enter your first number: ";
	cin >> num[0];
	cout << endl;

	for (int x = 1; x < 5; x = x + 1)
	{
		cout << "Next number: ";
		cin >> num[x];
	}


	//keep repeating as long as swaps are made
	while (swap == 'Y')
	{
		swap = 'N';		//assume no swap is neccessary
		x = 0;			//begin comparing the first array element


		//compare adjacent array elements to determine whether a swap is needed
		while (x < maxSub)
		{
			if (num[x] > num[x + 1])
			{
				//a swap is needed
				temp = num[x];
				num[x] = num[x + 1];
				num[x + 1] = temp;
				swap = 'Y';
				lastSwap = x;
			}	//endif
			x += 1;	//increment subscript
		}	//endwhile
		maxSub = lastSwap;	//reset max subscript
	}	//endwhile

	//display sorted array
	for (int x = 0; x < 4; x = x + 1)
		cout << num[x] << endl;
	//end for

	//pass array on to get average
	displayAverage(num);

}	//end of sort function


void displayAverage(int numbers)
{
	int total = 0;
	double average = 0;
	
	//Gets total
	for (int x = 0; x < 5; x += 1)
		total = total + numbers[x];
	//end for

	//calculates and displays average
	average = static_cast<double>(total) / 5.0;
	cout << "Average: " << average << endl;
}	//end of average function

[Moschops]

You're passing displayAverage a pointer to an int, but it expects an int. Change what it expects.

Your compiler already said this when it presented you with the error.

[ResidentBiscuit]

What do you mean? "Pointer to an int"? How do I change this?

[Moschops]

What do you mean? "Pointer to an int"?

A pointer is a fundamental data type in C++. Definitely read up on them.

See this function; void displayAverage(int numbers) ? It accepts an object of type int, named numbers.

See this function call; displayAverage(num); ? You're passing in num, which is a pointer to an int.

The function accepts an int. You are passing a pointer to an int. num is an array; when you pass an array like that, you're passing a pointer. If you passed num[1] you would be passing an int.

When a function accepts one type as an input parameter, you cannot just try to pass it something else. Sometimes the compiler will make a guess as to what you meant and try to convert it for you; sometimes it will simply give up. In this case, it's giving up.

[ResidentBiscuit]

Ooh I get you now. Ok so I cant pass the whole array here? I can only pass elements of it?

[Moschops]

In this context, the array variable num is just syntactic sugar around a pointer to the start of the array, and ways of dereferencing parts of it.

num[x] is identical to *(num+x) which just means "take the pointer num, move along x, and then dereference it".

[ResidentBiscuit]

Ok so how would I achieve what I am trying to accomplish here? If passing a whole array to a function is not possible?

Well, I could declare the array globally?

[ResidentBiscuit]

Omg, ok I am stupid. I figured it out. Thank you for all your help though! Took me a good few hours to just figure out my argument was wrong :/