Vector of pointers c++

Sat, 25 Jul 2026 06:59:43 +0000

Vector of pointers c++

In this tutorial we gonna learn about vector of pointers. First we will see what are vectors and pointers. then in next section we are going to learn about the methods of how to create a vector of pointers. We basically gonna follow C++ language here.

A Table of Contents:

Vectors
Pointers
How to create the vector of Pointers in c++
Method 1 : The new Operator is used to create Vector of Pointers in C++
Method 2 : [] Notation is used to create Vector of Pointers in C++
Method 3 : std::vector container is used to create Vector of Pointers in C++
The Conclusion

Vectors #

Definition

Vector is a template class in the Standard Template Library (STL) that function as a refined array. Vectors can be resized themselves automatically when we insert or delete elements, so they're great to use when working with constantly changing data. But in array we can resize it. Using vectors in our program enables us to store our data with more flexibility and efficiency.

Let's examine how to define a vector in C++

        
    #include 
    #include 
    using namespace std;
    
    int main() {
    
        vector vec;  
    
        vec.push_back(6); 
        vec.push_back(5); 
        vec.push_back(8);
        vec.push_back(0); 
        vec.push_back(5); 
    
        for (int i = 0; i < vec.size(); i++)
        {
        cout << vec[i] << endl; 
        }
        return 0; 
    }

        </code>

Output:

Pointers #

Definition

Pointers are one of the most important aspects of C++. Pointers are another type of variables in CPP and these variables store addresses of other variables. While creating a pointer variable, we need to mention the type of data whose address is stored in the pointer .e.g. inorder to create a pointer which stores address of an integer, we need to write:

int *p;

This means that p will contain address of an integer. So ,if a pointer is going to store address of datatype X, it will be declared like this:

X *p;

Now let's say we have an integer i & an integer pointer p, we will use address of(&) operator inorder to put a ddress of i in p. Address of operator :& as studied abpveisaunary operator which returns address of a variable .e.g. &i will give us address of variable i. Here is the code to put address of i in p.

int i =10;
int *p;
p=&i;

            
        #include
        using namespace std;

        int main()
        {
            int firstvalue= 5, secondvalue = 15;
            char thirdvalue= 'a';
            int *p1, *p2;
            char *p3;
            p1= &firstvalue; 
            p2= &secondvalue;
            p3= &thirdvalue;
            *p1= 10;
            *p2= *p1;
            p1= p2;
            *p1= 20;
            *p3= 'b';
            cout<<"firstvalue is" << firstvalue<<'\n';
            cout<<"secondvalue is" << secondvalue <<'\n';
            cout<<"thirdvalue is" << thirdvalue<<'\n';
            return 0;
        }

            </code>

Outputs:

            
                firstvalue is 10
                secondvalue is 20
                thirdvalue is b

How to create the vector of Pointers in c++ #

There are 3 methods for creating the vector of Pointers in c++

Method 1 : The new Operator is used to create Vector of Pointers in C++
Method 2 : [] Notation is used to create Vector of Pointers in C++
Method 3 : std::vector container is used to create Vector of Pointers in C++

Method 1 : The new Operator is used to create Vector of Pointers in C++ #

The new keyword is used to create a vector of pointers in dynamically allocated on the heap.

            
        #include 
        #include 
    
        using namespace std;
        
        
        int main()
        {
            int *pointers_vec = new int[8];
            cout << "vector pointers addresses are :" << endl;
            for(int i = 0; i < 8; ++i) {
                cout << &pointers_vec[i] << endl;
            }
            return 0;
        }

            </code>

Outputs:

            
                vector pointers addresses are :
                0x2561c27
                0x2561c24
                0x2561c30
                0x2561c38
                0x2561c40
                0x2561c48
                0x2561c50
                0x2561c58

Method 2 : [] Notation is used to create Vector of Pointers in C++ #

This method uses the array notation - [] that declare a constant-length array. It is similar to regular array declaration, but in this case, we are more interested in accessing the each element's addresses. So we are using the & operator to access pointers in the vector.

            
        #include 
        #include 
        
        using namespace std;
        
        
        int main()
        {
            int *pointers_vector[5];
        
            cout << "pointers vectors  addresses are:" << endl;
            for(auto &a : pointers_vector) {
                cout << &a << endl;
            }
            
            return 0;
        }

            </code>

Outputs:

            
                pointers vectors  addresses are:
                0x7ffead7a00d0
                0x7ffead7a00e8
                0x7ffead7a00f8
                0x7ffead7a0100
                0x7ffead7a0108

Method 3 : std::vector container is used to create Vector of Pointers in C++ #

std::vector offer a rich functionality to allocate vector of pointers and to manipulate the vector with multiple built-in functions. This method also provides a more flexible interface for new element creation during the run-time.

            
            #include 
            #include 
            
            using namespace std;
            
            int main()
            {
                vector vector_pointers(5, nullptr);
                cout << "vector_pointers addresses are:" << endl;
                for(int i = 0; i < 5; ++i) {
                    cout << &vector_p[i] << endl;
                }
                return 0;
            }


            </code>

Outputs:

            
                vector_pointers addresses are:
                0x1255cf20
                0x1255cf28
                0x1255cf30
                0x1255cf38
                0x1255cf40

The Conclusion

And there you have it! You have seen simple ways to create vector of pointers in C++.Thank you for sticking with this tutorial all the way to the end. Let us know if this post helped you to fix the problem. If you still have issues, please add to the comments the error you are getting into. We would do our best to reply and help you fix the problem. Cheers!

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Vector of pointers c++

Vector of pointers c++

A Table of Contents:

Vectors #

Definition

Pointers #

Definition

How to create the vector of Pointers in c++ #

Method 1 : The new Operator is used to create Vector of Pointers in C++ #

Method 2 : [] Notation is used to create Vector of Pointers in C++ #

Method 3 : std::vector container is used to create Vector of Pointers in C++ #

The Conclusion