I inclue the file but the function could not be seen

[mmahdavyrad]

Hi every one
I really appreciate If you can help me in this problem.
I have a page called s.cpp with a function in it called "calculate" like below

 float Sim::calculate(float e){}

As I want to use it in another page called p.cpp I include s.h on the c.pp
but when I wrote down the name of function it is not recognized

                        if(x!=-1)
			{
				.....//some codes
			}
			else
			{
                               float newE = calculate(e); 
			}

Can you guess why it is not recognized?
Thank you in advance for any comments

[jlb]

Probably because you didn't add s.cpp to your project or compile line so the linker couldn't find the implementation.

[MikeyBoy]

Are you talking about a compile-time error, or a link-time error?

If you have error messages, then tell us what those errors are. I cannot understand why you thought it would be better to withhold that information from us!

[mmahdavyrad]

Thank you for your response. It is a link-time error and it is said : "Function 'calculate' could not be resolved". I use Eclipse for write down codes

[mmahdavyrad]

Thanks jlb for your comment.
What is compile line?
all of my files is in one project.

[MikeyBoy]

One obvious thing is that you've defined your function as:

float Sim::calculate(float e){}

What is Sim? A namespace? A class?

The snipped of calling code you've shown us doesn't give us any clue about how it knows that it's looking for the function in something called Sim.

[mmahdavyrad]

Sim is the class that is defined in the h file of the s page

[MikeyBoy]

And that bit of code you've shown us that tries to call calculate() - is that part of the class too?

Because if it isn't, then the code is trying to call a free function called calculate(), which is not the same thing as Sim::calculate().

[mmahdavyrad]

class Sim {
public:
float calculate(float e)
}
yes it is defined in this s.h page

[MikeyBoy]

I'm asking about the code that calls calculate(). It needs to call that method on an object of type Sim. Where is that object?