How to Access Vector Methods from Pointer to Vector in C++? Last Updated : 17 May, 2024 Comments Improve Suggest changes Like Article Like Report In C++, we can create a pointer that points to the object of vector type. In this article, we will learn how to access member functions of std::vector from a pointer to the vector in C++. Example Input:vec = {1, 2, 3, 4}vector<int>* ptr = vecOutput:ptr->at(2): 3Accessing std::vector Methods using Pointers in C++We can access the member functions of a std::vector from a pointer to the vector in a similar way as we access member functions from an object, but with a difference that we have to use arrow operator (->) instead of the dot operator (.) to access its members (both functions and variables). Syntax to Access Member Functions From PointerpointerName->memberFunction(args);Here, pointerName is the name of the pointer to the vector.memberFunction is the name of the member function that we want to access.args is the arguments if anyC++ Program to Access Member Functions From Pointer to a VectorThe below program demonstrates how we can access member functions from a pointer to a vector in C++. C++ // C++ program to access member function from pointer to a // vector #include <iostream> #include <vector> using namespace std; int main() { // Declaring a pointer to a vector vector<int>* vectorPtr = new vector<int>(); // Adding elements to the vector vectorPtr->push_back(10); vectorPtr->push_back(20); vectorPtr->push_back(30); // Accessing and printing data using pointer cout << "Elements of vector: "; for (int i = 0; i < vectorPtr->size(); ++i) { cout << (*vectorPtr)[i] << " "; } return 0; } OutputElements of vector: 10 20 30 Time Complexity: O(1)Auxilliary Space: O(1) Comment More infoAdvertise with us Next Article How to Access Vector Methods from Pointer to Vector in C++? A akshitsaxenaa09 Follow Improve Article Tags : C++ Programs C++ cpp-pointer cpp-vector CPP Examples +1 More Practice Tags : CPP Similar Reads How to Access Vector Element Using Iterator in C++? In C++, vectors are container that works like a dynamic array. STL provides iterators for the traversal of these containers. In this article, we will learn how to access an element in a vector using an iterator in C++. Example Input: myVector = {1, 5, 8, 1, 3, 4} Output: myVector value at index 5 us 2 min read How to Access the Last Element in a Vector in C++? Given a vector of n elements, the task is to access the last element in C++.ExamplesInput: v = {11, 23, 9, 7};Output: 7Explanation: Since 7 is the last element of the vector.Input: v = {1, 3, 11, 52};Output: 52Explanation: Since 52 is the last element of the vector.Following are the different ways f 2 min read How to Create Vectors of Unique Pointers in C++? In C++, the vector is defined as a dynamic array that can grow or shrink in size. Vectors of unique pointers are commonly used to manage the collections of dynamically allocated objects as they combine the dynamic resizing capability of vectors with the automatic memory management provided by unique 2 min read How to Access First Element in a Vector Using Iterator in C++? In C++, vectors are containers similar to arrays but unlike arrays, vectors can resize themselves during the runtime. These vectors provide iterators to access their elements. In this article, we will learn how to access the first element in a vector using an iterator in C++. Example Input:myVector 2 min read How to Access the First Element of a Vector in C++? In this article, we will learn how to access the first element of vector in C++.The most efficient way to access the first element of vector is by using vector front() function. Let’s take a look at a simple example:C++#include <bits/stdc++.h> using namespace std; int main() { vector<int 2 min read Like