How to Shuffle a List in C++

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How to Shuffle a List in C++ ?

Answer

To shuffle a list in C++, you can use the std::shuffle method provided by the C++ standard library.

✐ Examples

1 Shuffle a List of Integers

In this example,

We include the necessary headers: , , and .
We create a list named numbers with integer values.
We create a random number generator using std::default_random_engine.
We call the std::shuffle function with the iterators of the list and the random number generator.
The std::shuffle function randomly rearranges the elements in the list.
Finally, we print the shuffled list to standard output.

C++ Program

#include <algorithm>
#include <random>
#include <list>
#include <iostream>

int main() {
    std::list<int> numbers = {1, 2, 3, 4, 5};
    std::vector<int> vec(numbers.begin(), numbers.end());
    std::random_device rd;
    std::default_random_engine rng(rd());
    std::shuffle(vec.begin(), vec.end(), rng);
    numbers.assign(vec.begin(), vec.end());
    
    std::cout << "Shuffled list: ";
    for (int num : numbers) {
        std::cout << num << " ";
    }
    std::cout << std::endl;
    return 0;
}

Output

Shuffled list: 3 1 5 4 2

2 Shuffle a List of Strings

In this example,

We include the necessary headers: , , and .
We create a list named words with string values.
We create a random number generator using std::default_random_engine.
We call the std::shuffle function with the iterators of the list and the random number generator.
The std::shuffle function randomly rearranges the elements in the list.
Finally, we print the shuffled list to standard output.

C++ Program

#include <algorithm>
#include <random>
#include <list>
#include <string>
#include <iostream>

int main() {
    std::list<std::string> words = {"apple", "banana", "cherry", "date", "elderberry"};
    std::vector<std::string> vec(words.begin(), words.end());
    std::random_device rd;
    std::default_random_engine rng(rd());
    std::shuffle(vec.begin(), vec.end(), rng);
    words.assign(vec.begin(), vec.end());
    
    std::cout << "Shuffled list: ";
    for (const std::string& word : words) {
        std::cout << word << " ";
    }
    std::cout << std::endl;
    return 0;
}

Output

Shuffled list: cherry elderberry apple banana date

Summary

In this tutorial, we learned How to Shuffle a List in C++ language with well detailed examples.

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How to Shuffle a List in C++

How to Shuffle a List in C++ ?

Answer

✐ Examples

1 Shuffle a List of Integers

C++ Program

Output

2 Shuffle a List of Strings

C++ Program

Output

Summary

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