我如何在C ++中将给定大小的数组改组并与另一个相同大小的数组进行比较

Question

suppose I have an array A={212,323,234,567,545,765} and now I want shuffle this array so that the values are arranged randomly

like after shuffling it can be A={234,765,212,545,323,567}

I am not getting any clue how to solve this problem ?

Answer 1

Check std::shuffle and std::equal . There are some examples in documentation that will help you.

Answer 2

For basic shuffling you'd want to use std::shuffle .

#include <algorithm>
#include <array>
#include <random>
#include <iterator>
#include <iostream>

int main()
{
    // Create mersenne twister RNG
    std::random_device rd;
    std::mt19937 g(rd());
    // Initialize Array A
    std::array<int, 6u> A{ 212,323,234,567,545,765 };
    // Print A
    std::copy(A.begin(), A.end(), std::ostream_iterator<int>(std::cout, " "));
    std::cout << "\n";
    // Shuffle A
    std::shuffle(A.begin(), A.end(), g);
    // Print A
    std::copy(A.begin(), A.end(), std::ostream_iterator<int>(std::cout, " "));
    std::cout << "\n";
}