Calling member functions of a class object which is present in header file included

I am new to the forum i wanted to call a member function of an included header file..Here is code i have written

#include<stdio.h>
#include "Abc.h"

CAbc *a;//CAbc is a class present in Abc.h

int main(int argc,char **argv)
{
int i=10;
float j=15.5;
bool x;
x=a->method(i,j);//method is a member function of CAbc
if(x)
{
    printf("Working Correctly");
}
else
{
    printf("Not Working");
}

}

If i compile this using

g++ -I/path/to/include code.cpp

I get the Error

/tmp/cc5JgLfF.o: In function `main':
 code.cpp:(.text+0x3d): undefined reference to `CAbc::method(int,float)'
 collect2: ld returned 1 exit status

I also tried giving

x=a::method(i,j);

for which i get a is not a class or namespace

Please开发者_如何学编程 can anyone tell me am i doing it correctly or not?

---

It looks as though you are forgetting to include the implementation source/object.

Try this:

g++ -I/path/to/include Abc.cpp code.cpp

as long as your implementation class for Abc.h corresponds to Abc.cpp.

Regards,
Dennis M.

---

Does your make file or whatever link CABC.obj to the whole exe? If so, then you have forgotten to write the implementation (body, definition) of method...

---

As others have said, make sure there's an implementation of CAbc.method being linked. Additionally, you need to allocate and deallocate the memory for pointer 'a'; at the moment it's uninitialized.

 a = new CAbc();
 ...
 del a