random 2d array

[djibos1]

I'm implement function of 2D array filled with random content 1 to M. The issue is that when I run the program, I must to get these response. 1 loop is authorized

Result wanted: Is dictionary/map
Key: number
value: frequency of key from array a and b

a = [2,1,1,4]
b = [1,3,3,5,5]
response = {1:3,2:1,5:2,3:2,4:1}

I try this code by I do not get a good result

// abd_test.cpp : définit le point d'entrée pour l'application console.
//

#include "stdafx.h"
#include <iostream>
#include <string>
#include <vector>
#include <iostream>
#include <algorithm>
#include <cstdlib>
#include <ctime>

using namespace std;

class Random
{
public:
Random()
{
srand(static_cast<unsigned int>(time(NULL)));
}

unsigned int operator()(unsigned int max)
{
double tmp = static_cast<double>(rand()) / static_cast<double>(RAND_MAX);
return static_cast<unsigned int>(tmp * max);
}
};

int main(int argc, char** argv)
{
int random_numbers[10000];
int size = sizeof(random_numbers) / sizeof(int);
for (int i = 1; i<size; ++i)
random_numbers[i] = i;
Random r;
random_shuffle(random_numbers, random_numbers + size, r);
for (int i = 1; i < 10000; i++)
{
cout << random_numbers[i] << endl;
}
system("pause");
return 0;
}

[kbw]

I'm implement function of 2D array filled with random content

Why not use rand() to fill each element as in

#include <algorithm>
#include <cstdlib>

int main(int argc, char* argv[])
{
    int random_numbers[10000];
    std::generate_n(random_numbers, 10000, std::rand);
//  std::random_shuffle(random_numbers, random_numbers + 10000);
}

Why are you doing that shuffle?

[djibos1]

Thank Kbw, My problem is these two vectors. these two given vectors that my program has to write with this frequency,

a = [2,1,1,4]
b = [1,3,3,5,5]
response = {1:3,2:1,5:2,3:2,4:1}

[kbw]

My problem is these two vectors. these two given vectors that my program has to write with this frequency,

I don't understand what you mean.