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"function does not take 0 arguments"

njenn5 (2)
I'm just trying to get through this class, but I'm starting to struggle with basic things. This is the only error I have showing on my "radius = getRadius();" line. I see tons of examples where this works, but for me it doesn't. Please help.

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  #include <iostream>
using namespace std;

double getRadius(double radius);
double findArea(double area);
double findCircumference(double circumference);

int main()
{
	double radius;
	double area;
	double circumference;

	radius = getRadius();
	area = findArea((radius));
	circumference = findCircumference(radius);



	cout << "A circle with radius " << radius << "has an area of " << area << endl;
	cout << "and a circumference of " << circumference << endl;

	system("pause");
	return 0;
}


	double getRadius()
	{
		double radius;

		cout << "Enter the radius of the circle";
		cin >> radius;
		return radius;
	}

	double findArea()
	{
		double area = (3.14159*getRadius()*getRadius());
		return area;
	}

	double findCircumference()
	{
		double circumference = (2*3.14159*getRadius());
		return circumference;
	}
integralfx (897)
 
 
double getRadius(double radius);

and
 
 
double getRadius()

don't match.
njenn5 (2)
I removed the "double radius" and added "double" to my other functions and now it kinda works. I get prompted to enter the radius 4 times, which I assume is because I have the "getRadius()" function in my other functions. How would I strictly get the inputted radius value into those functions with another prompt?
integralfx (897)
1
2
 
double findArea(double area);
double findCircumference(double circumference);

1
2
 
double findArea()
double findCircumference()

don't match.

How would I strictly get the inputted radius value into those functions with another prompt?

Simply, ask for the radius in main() and pass that as an argument for your other functions.
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