Calling a function

[cbouwkamp]

Okay this is going to be going back to the basics, but its a question about the best way of doing something. I need to call a function in another class. Is the best way to do that just to construct a class object and call the function with the class object like:
someclass.function();

or is there a better way to call the one function I need without tying the 2 classes together.

[firedraco]

Well, you could also just call the function normally.*

*I'm not really sure what you are trying to the ask though.

[cbouwkamp]

I mean if the function is in another class that is another header.

#include <iostream>
#include <vector>
#include <ctime>
#include <algorithm>
#include "simpleRandomNumber.h"
#include "calculateAverage.h"
#include "calculateStandardDeviation.h"
using namespace std;

class application{
private:
	vector<double> simpleNumber;
	double average;
	double deviation;

	void simpleOutput(){
		cout << "Simple random generator\n------ ------ ---------\n";
		for(vector<double>::iterator i = simpleNumber.begin(); i!= simpleNumber.end(); ++i){
			cout << *i <<"\n";
		}
		cout << "Average: " << average << "\n";
	}

public:
	void run(){
		srand(time(0));
		generate_n(back_inserter(simpleNumber), 10, simpleRandomNumber());
		sort(simpleNumber.begin(), simpleNumber.end());
		calculateAverage calc;
		calculateStandardDeviation calcTwo;
		average = calc.getAverage(simpleNumber);
		deviation = calcTwo.getDeviation(simpleNumber);

		simpleOutput();
	}
};

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

class calculateAverage{
private:
	double total;
public:
	double getAverage(vector<double> numbers){
		for(int i = 0; i < 10; i++){
            total = total + numbers[i];
		}
		return total / 10;
	}

};

to call get average from the application class do I need to construct a calculate class object like I did and the call it or is there another way to call it

[firedraco]

In this case, you would need to create an object to call the function. However I'm wondering why you have a class for calculating an average...it seems like it would be better to just have it as a global function or as a member function of application.

[cbouwkamp]

In the class all the assignments are supposed to use headers on things we will use multiple times. So we get used to using headers and stuff