What's wrong with this program?

[Protoman]

Could you tell me what's wrong with this program, it doesn't compile:

#include <iostream>
#include <cstdlib>
using namespace std;

class Everything
{
public:
static Everything* Instance()
{
if(instance==0)
instance=new Everything;
return instance;
}
const long double pi;
const long double e;
const long double phi;
private:
Everything():pi (3.14591),e(2.7 1828),phi(1.618 034){}
Everything(cons t Everything&);
Everything& operator=(const Everything&);
private:
static Everything* instance;
};
Everything* Everything::ins tance = 0;// initialize pointer

Everything* var=Instance();
int main()
{
long double* area(const long double& radius, const Everything* var);
long double rad;
cout << "Enter a radius: ";
cin >> rad;
long double* ret=area(rad,va r);
cout << "Area: " << *ret << endl;
delete ret;
system("PAUSE") ;
return EXIT_SUCCESS;
}
long double* area(const long double& radius, const Everything* var)
{
template<class T>T Exp(const T& base,long long exp);
long double* ret=new long double(var->pi*Exp<long double>(radius, 2));
return ret;
}
template<class T>
T Exp(const T& base,long long exp)
{
for(T i=1;exp>0;exp--)
i*=base;
return i;
}

Any suggestions? Thanks!!!

[Niklas Norrthon]

"Protoman" <Pr**********@g mail.com> writes:

Never mind, I fixed that, now its saying that var is undeclared in the
area function and that's there's a missing semicolon and stuff.
Here's the code:

#include <iostream>
#include <cstdlib>
using namespace std;

template<class T>
T Exp(const T& base,long long exp)

When getting loads of errors, the best recipie is usually to fix
the first one, and then recompile. I tried your source, and am
willing to help you with the first one:

protoman.cc:7: error: ISO C++ does not support `long long'

The best way to fix a compile error is not to post garbage code to
clc++, but to read the error message, try to understand what
it says, then try to understand why it says so, and finally
fix the corresponding line of code.

Step one: "protoman.c c:7: error: ISO C++ does not support `long long'"

This means that there is something with the file 'protoman.cc'
(which is what I named it on my computer, it might be something
else on your).

That something happens at (or near) line 7, and it is an 'error'
(which is my compiler's way of saying: "I refuse to output any
result (other than compiler messages)". It could have said
warning, which would have meant: "Maybe an error, you decide".

The message is "ISO C++ does not support `long long'"

This means that there is no type named long long in C++.
The line in question reads: "T Exp(const T& base,long long exp)"

At the end immediatly before the token 'exp' it says long long.
The obvious way to fix this is to change either to a type that
exists in the language, or to a user defined type.

Now fix this, recompile, and then repeat the process until there
are no errors left.

If there is some specific error message you really don't understand,
post that message together with a minimal code sample that produce
that error, and you might find some more help here, or perhaps you'll
find out what it means in the process of minimizing the code sample.

By the way, please post properly indented code next time.

/Niklas Norrthon