tofunater

Alright, so I just tried writing my first program on how to find the volume of a cylinder.
I'm struggling to get it to compile though because of an error on the sixth line. My teacher's notes are terrible and I won't have a reference book until after this weekend. So any help would be much appreciated.

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muels7

when u ask for the height, ur variable is h, but in the rest of the program it is "he", u need to change the h to he.

muels7

also, for you second cout, you used >> instead of <<.

tofunater

changed, and I'm still receiving the same error. Thanks for the catch though. +

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muels7

here, try this instead


#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
double r, he;
cout<<"What is the radius of the cylinder?";
cin>>r;
cout<<"What is the height of the cylinder?";
cin>>he;
p = 3.14159
v = p * r * r * he;
sae = 2 * p * r * r;
sas = 2 * p * r * he;
sac = (2 * p * r * r) + (2 * p * r * he);
cout<<"/n Radius"<< r;
cout<<"/n Height"<< he;
cout<<"/n Surface Area of the Ends"<< sae;
cout<<"/n Surface Area of the Sides"<< sas;
cout<<"/n Surface Area of the Cylinder"<< sac;
cout<<"/n Volume of Cylinder"<< v;
system ("pause");
return 0;
}


You missed a few semi colons and used () instead of {}

goodolsen

p = 3.14159 you area missing the ;

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Andru

You need to classify p and v as doubles first. Same goes for sae, sas, sac.

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We Are Gr33n Machine

Drift0r

You can use the "pow" function to raise something to the power of a number. It makes it easier than putting R * R

Also the second cout statement has the "<<" facing the wrong way.

I see you fixed it
This. I didn't catch this on my first time round. p is not set as a variable which means the computer doesn't know where to assign the number to.

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muels7

this, i missed it as well.

tofunater

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
double r, he;
cout<<"What is the radius of the cylinder?";
cin>>r;
cout<<"What is the height of the cylinder?";
cin>>he;
double p = 3.14159;
v = p * r * r * he;
sae = 2 * p * r * r;
sas = 2 * p * r * he;
sac = (2 * p * r * r) + (2 * p * r * he);
cout<<"/n Radius"<< r
cout<<"/n Height"<< he
cout<<"/n Surface Area of the Ends"<< sae;
cout<<"/n Surface Area of the Sides"<< sas;
cout<<"/n Surface Area of the Cylinder"<< sac;
cout<<"/n Volume of Cylinder"<< v;
system ("pause");
return 0;
}

I have this now, and I made it until line 12, where it says that v is undeclared.

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