How to use the vector class In C++

A vector is a dynamic array that doubles its size whenever a new character is added that exceeds its limit. The STL container vector can be used to dynamically allocate an array that can vary in size.

This is only usable in C++, as C does not have classes. Note that the initializer-list syntax here requires a compiler that supports the 2011 C++ standard, and though it is quite likely your compiler does, it is something to be aware of.

Example:

C++

// C++ program to demonstrate 
// array of strings using 
// vector class
#include <iostream>
#include <string>
#include <vector>
 
// Driver code
int main()
{
  // Declaring Vector of String type
  // Values can be added here using 
  // initializer-list
  // syntax
  std::vector<std::string> colour{"Blue", "Red",
                                  "Orange"};
 
  // Strings can be added at any time 
  // with push_back
  colour.push_back("Yellow");
 
  // Print Strings stored in Vector
  for (int i = 0; i < colour.size(); i++)
      std::cout << colour[i] << "\n";
}

Output

Blue
Red
Orange
Yellow

Explanation:

Vectors are dynamic arrays and allow you to add and remove items at any time.
Any type or class may be used in vectors, but a given vector can only hold one type.

Array of Strings in C++ – 5 Different Ways to Create

In C++, a string is usually just an array of (or a reference/points to) characters that ends with the NULL character ‘\0‘. A string is a 1-dimensional array of characters and an array of strings is a 2-dimensional array of characters where each row contains some string.

Below are the 5 different ways to create an Array of Strings in C++: