Calling functions

[jado765]

So I get 3 errors when the following code is run, errors i really don't know how such a thing can happen. They are 3 of the same error:

1>c:\users\jad\desktop\program 2.cpp(47) : error C2664: 'level' : cannot convert parameter 1 from 'double *' to 'double'

 #include <iostream>

using namespace std;

double level(double a, double b)
{
	if (a>b)
	{
		a=a/2;
		return a,b;
	}
	if (a<b)
	{
		b=b/2;
		return a,b;
	}
	if (a=b)
	{
		a=a/2;
		b=b/2;
		return a,b;
	}
}

void main()
{
	double a;
	double b;
	double c;
	double d;

	a=100;
	b=200;
	c=400;
	d=800;
	
	cout<<"Enter 4 numbers: ";
	cin>>a;
	cin>>b;
	cin>>c;
	cin>>d;

	double level (double,double);
	
	for (int i=0;i<10;i++)
	{
		cout<<	level(&a,  level(&b,  level(&c,&d)));
		cout<<" ";
	}
	
	char r;
	cin>>r;
}

[jado765]

Exactly what am I doing wrong here?

[Ganado]

Line 17 - don't use assignment (=), test equality (==).

Line 10, 15, 21; A function can only return one value. The , operator isn't doing what you think it's doing, you shouldn't be trying to return more than 1 value.

Line 43 - Maybe you know this, but you should realize that this is a being seen by the compiler as just a function prototype. Line 43 doesn't run your function.

Line 47, why are you passing in the addresses of a b and c?
If you meant to use C++ references, you need to format your level function to be
double level(double& a, double& b)

Also, main should be return int, not be void.

[jado765]

Well the errors are gone, however the program isn't working as it should be, thank you for answering my question anyways