Problems with Structure Lab. Assistance appreciated

[dantelt]

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

using namespace std;

const double PI = 3.14159265358979323846;

struct Cone
{
double height; // height of the cone
double radius; // radius of the base of the cone
}shape;

void input(double& height, double& radius);
void setUp(double height, double radius, Cone *conePtr);
double getVolume(Cone *conePtr);
void output(Cone *conePtr);

int main()
{
Cone *conePtr;
conePtr = &shape;

double height;
double radius;

conePtr = new Cone;

input(height, radius);
setUp(height, radius, conePtr);
output(conePtr);

delete [] conePtr;
return 0;

}

void input(double& height, double& radius)
{
cout << "Enter the height of the cone: " << endl;
cin >> height;
cout << "Enter the radius of the base of the cone: " << endl;
cin >> radius;
}

void setUp(double height, double radius, Cone *conePtr )
{

conePtr->height = height;
conePtr->radius = radius;
}

double getVolume(Cone *conePtr)
{
double Volume;
double height;
double radius;
conePtr->height = height;
conePtr->radius = radius;
Volume = PI * radius * radius * height / 3 ;
return Volume;
}

void output(Cone *conePtr)
{
double Volume;
getVolume(conePtr);
cout << "The height of the cone is " << conePtr->height << endl;
cout << "The radius of the base of the cone is: " << conePtr->radius << endl;
cout << "The volume of the cone is: " << Volume << endl;

}

I am having trouble with getting the right values out of the lab. I keep getting junk back when I run the program. This is what I get back when running the program

Enter the height of the cone:
6
Enter the radius of the base of the cone:
2
The height of the cone is 2.54505e-307
The radius of the base of the cone is: 9.61639e-317
The volume of the cone is: 2

Process returned 0 (0x0) execution time : 3.182 s
Press any key to continue.

I believe the problem is that the data isn't getting stored into the array and Idk how to fix that. I want the program to be able to get user input. Then take that input and store it into a structure. Then it has to compute the volume and display the output.

[booradley60]

delete [] conePtr;
This line shouldn't have the square brackets. You didn't declare an array when you said conePtr = new Cone;
In your getVolume function, try changing these lines

conePtr->height = height;
conePtr->radius = radius;

to

height = conePtr->height;
radius = conePtr->radius;

The way it is right now you blow away what's stored inside conePtr->radius with whatever garbage is on the stack when double radius; is declared in the function. Same goes for height.

[dantelt]

Thanks so much for the help. Deleting and switching around the syntax in the equation worked. Just one other question. I'm still getting the value of the volume to be 2 when I input 6 for the height and 2 for the radius but that's not correct. Is there something wrong with the equation or is it a logic error? It seems that whatever value I have the user enter for radius becomes the value for volume.