class inher : private vector<option *>

[ganeshp]

#include<iostream>
#include<vector>
using namespace std;
 
 
class option
{
 
};
 
 
class inher : private vector<option *>
{
            public :
 
            void push_back(option * a)
            {
                vector<option *>::push_back(a);
            }
};
 
int main(void)
{
 
 
return 0;
}

This code compiles successfully.
My , questions are:

1)Can any body explain the meaning of the statement "class inher : private vector<option *>"

2)Which function gets called in the statement , or can you explain the meaning of the statement given below.
" vector< option * > :: push_back(a); "

[svlsr2000]

#include<iostream>
#include<vector>
using namespace std;
 
 
class option
{
 
};
 
 
class inher : private vector<option *>
{
public :
 
void push_back(option * a)
{
vector<option *>::push_back(a);
}
};
 
int main(void)
{
 
 
return 0;
}

This code compiles successfully.
My , questions are:

1)Can any body explain the meaning of the statement "class inher : private vector<option *>"

2)Which function gets called in the statement , or can you explain the meaning of the statement given below.
" vector< option * > :: push_back(a); "

Your class inher is inheriting from c++ stl vector class.
Have a look at http://www.yolinux.com/TUTORIALS/Lin...TL.html#VECTOR
for exploring more about vector

[gpraghuram]

HI,
Answer to the second question
2)Which function gets called in the statement , or can you explain the meaning of the statement given below.
" vector< option * > :: push_back(a); "

---->The push_back is the method available with the vector container.

As explained by the svlsr you can take a look at the vector reference for more info.

Raghuram

[AdrianH]

Your class inher is inheriting from c++ stl vector class.
Have a look at http://www.yolinux.com/TUTORIALS/Lin...TL.html#VECTOR
for exploring more about vector

To be more specific, it is privately inheriting from vector (this is called implementation inheritance). The introduced push_back() method is to allow a user of the class access to that method of the vector class (it could have been named anything you wish, the writer just happened to name it with the same name and signature).


Adrian