Arrays with functions

[yehozz]

I am trying to complete this program, but i cant get it to work.

So i should create this function with the following head
"float medel(int v[], int n)"

so the function should take the total sum in the array in main and return the average number the array has.

So i know in my head how it should work, but i cant write it out... and now looking if someone can guide me in the right direction.


atm my main looks like this

#include <iostream>
#include "medel.h"
; using namespace std;

int main()
{
	int n = 5;
	float speed[] = { 30, 50, 75, 100, 110 };
	float speedsum = speed[0] + speed[1] + speed[2] + speed[3] + speed[4];
	float medel = speedsum;
	cout << medel << endl;



}

and my function looks like this

float medel(int speedsum, int n)
{
	float medel = speedsum / n;
	return medel;



}

I get the following error when i try to run it
Error C4335 Mac file format detected: please convert the source file to either DOS or UNIX format

What am i doing wrong?

Thanks for any help given :)

[yehozz]

Apperently i should create a loop in the function that counts the amounts of elements in the array? How do i make the function count the amount of elements of an array?

[TarikNeaj]

Aren't you already sending in the amount of elements in the array?

float medel(int speedsum, int n)

isn't that the purpose of int n ?

[yehozz]

Yes i am, but if i wanted the function to find that out for himself, how would i do that?

[LB]

It's not possible.

If you want to do that, use a real container like std::vector - it has a .size() function, among other things.

[yehozz]

Alright thank you. But how do i call the function to use it on the variabel speedsum?
I want the average out of speedsum, and i want the function to do that for me.

[LB]

Your function already returns the average. Do you instead want it to also compute the sum?

[yehozz]

#include <iostream>
#include "medel.h"
; using namespace std;

int main()
{
	int n = 5;
	float speed[] = { 30, 50, 75, 100, 110 };
	float speedsum = speed[0] + speed[1] + speed[2] + speed[3] + speed[4];
	float medel123 = speedsum;
	cout << medel123 << endl;
}

float medel123(int speedsum, int n)
{
	float medel = speedsum / n;
	return medel;
}

The only output i get is 365, so i havent figured it out how to call the function i think...

[LB]

You need to call the function. Delete line 10 and replace line 11 with cout << medel123(speesum, n) << endl;

[yehozz]

Ooooh i got it now, Thank you so much!