I am learning how to create classes, and I had to create a class with a program to
test it that finds the volume and surface area of a sphere, cylinder, and cone.
I am having some problems- for my cone Volume, it is returning everything as 0. For the program, I have
counter = 1;
System.out.println("Cone Volume");
while (counter <= 10)
{
double radius = Math.random();
System.out.println("Radius: " + radius);
double h = Math.random();
System.out.println("H: " + h);
double coneVolume = yourTurnClass.coneVolume(radius,h);
System.out.println("answer: " + coneVolume);
counter++;
}
________
For the class I have:
public static double coneVolume(double radius, double h)
{
answer = (1/3*((Math.PI)*((radius*radius)*(h))));
return answer;
}
_________
Am I messing something up with pi?
Another problem I have is with coneSurface- I have formula:
public static double coneSurface(double radius, double h)
{
answer = (Math.PI*(radius*(Math.sqrt(h*h + radius*radius) + radius*radius)));
return answer;
}
and program
while (counter <= 10)
{
double radius = Math.random();
System.out.println("Radius: " + radius);
double h = Math.random();
System.out.println("H: " + h);
double coneSurface = yourTurnClass.coneSurface(radius,h);
System.out.println("answer: " + coneSurface);
counter++;
}
and my answers are coming out a bit off. Did I miss my formula up, or call something wrong?
My final problem is with the sphere volume- I have class
public static double sphereVolume(double radius)
{
answer = ((4/3)*(Math.PI)*(radius*radius*radius));
return answer;
}
and program
while (counter <= 10)
{
double radius = Math.random();
System.out.println("Radius: " + radius);
double sphereVolume = yourTurnClass.sphereVolume(radius);
System.out.println("answer: " + sphereVolume);
counter++;
}
_______
with answers slightly wrong again. Is there something I am doing wrong that is the same with all three of these?
THANK YOU SO MUCH FOR YOUR HELP!!!
