shuffle elements c++

To shuffle elements in C++, you can use the std::shuffle function from the <algorithm> library. Here are the steps involved:

1. Include the necessary headers:

#include <algorithm> // for std::shuffle
#include <random>    // for std::default_random_engine
#include <chrono>    // for std::chrono::system_clock

1. Create a random number generator engine:

std::default_random_engine rng(std::chrono::system_clock::now().time_since_epoch().count());

This line initializes the random number generator engine with a seed based on the current time.

1. Define the range of elements to shuffle:

int elements[] = {1, 2, 3, 4, 5};
int numElements = sizeof(elements) / sizeof(elements[0]);

In this example, we have an array of integers elements with 5 elements.

1. Shuffle the elements:

std::shuffle(elements, elements + numElements, rng);

The std::shuffle function takes three arguments: the start iterator of the range to be shuffled, the end iterator of the range to be shuffled, and the random number generator engine.

1. Print the shuffled elements:

for (int i = 0; i < numElements; i++) {
    std::cout << elements[i] << " ";
}
std::cout << std::endl;

This loop iterates over the shuffled elements array and prints each element.

By following these steps, you can shuffle elements in C++ using the std::shuffle function.