In C++, non-primitive data types are data structures defined by the programmer or provided by the language library. Here are some commonly used non-primitive data types in C++ along with examples:

Non-Primitive Data Types

1. Arrays: A collection of elements of the same type, stored in contiguous memory locations.
2. Strings: A sequence of characters stored as an array of characters.
3. Structures: A composite data type that groups together variables of different data types under a single name.
4. Classes: A user-defined data type that encapsulates data and functions within a single unit.
5. Pointers: A variable that stores the memory address of another variable.
6. Dynamic arrays: An array whose size can be changed at runtime. It is implemented using pointers.
7. Map: An associative container that stores elements in the form of key-value pairs.

And Other Data Types such as Linked Lists, Queues, Trees, etc. are Non Primitive Data Types

Example

#include <iostream>
#include <map> // For using map

using namespace std;
int main(){
    // Array
    int arr[5] = {1, 2, 3, 4, 5};
    // String
    string name = "John Doe";

    // Structure
    struct student{
        int roll_no;
        string name;
        float marks;
    };

    // Class
    class rectangle{
        int length, width;

    public:
        int area(){
            return length * width;
        }
    };

    // Pointer
    int x = 10;
    int *ptr = &x;

    // Dynamic Array
    int *dynamic_arr = new int[5];

    // Map
    // Use #include<map> for using map
    map<string, int> m;
}