Print amount of repeated numbers in array c++ - c++

Question

I was wondering how to print the amount of repeated numbers from a randomly generated array with an array size of 10, and numbers from 1 - 10.
Example:
Array1: 1 7 6 5 6 7 8 10 9 8
Number of Patterns: 3
(Because it consists of; 2 six, 2 seven, 2 eights)
So far for my code I have done this
#include <iostream>
#include <iomanip>
#include <string>
#include <time.h>
#include "Source.h"
#include <algorithm>
using namespace std;
void main()
{
//START OF PROGRAM CODE\\
//Declaritions\\
const int ArraySize = 10;
int arrayMain[ArraySize];
int array1[ArraySize];
int i = 0;
int j = 0;
int k = 0;
//End of Declairations\\
//Store Random Number in Array\\
srand((unsigned)time(0));
for (i = 0; i < 10; i++)
{
arrayMain[i] = (rand() % 10) + 1;
array1[i] = arrayMain[i]; //Copy mainarray to array1
}
for (j = 0; j != ArraySize; j++)
{
sort(array1, array1 + ArraySize); //Sort the array
}
//End of Store Random Number in Array\\
//Program Output\\
cout << "ArrayMain: " << arrayMain[0] << " " << arrayMain[1] << " " << arrayMain[2] << " " << arrayMain[3] << " " << arrayMain[4] << " " << arrayMain[5] << " " << arrayMain[6] << " " << arrayMain[7] << " " << arrayMain[8] << " " << arrayMain[9] << " " << endl;
cout << "Array1: " << array1[0] << " " << array1[1] << " " << array1[2] << " " << array1[3] << " " << array1[4] << " " << array1[5] << " " << array1[6] << " " << array1[7] << " " << array1[8] << " " << array1[9] << " " << endl;
//cout << "Number of Patterns: " << <DATA TO INPUT> << endl;
//END OF PROGRAM CODE\\
}

Answer 1

There's a very simple pattern. You could use an array (I'll be using a vector) of a size equal to the range of possible random numbers
//creates a vector ArraySize big with all elements initialized to 0
std::vector<int> results(ArraySize, 0);
Then, go through your loop and use the random numbers as indexes and increment the values
for(int i = 0; i < 10; i++)
results[(rand() % 10)]++;
Finally, to count how many patterns there are
std::cout << "Number of patterns: ";
std::cout << std::count_if(results.begin(), results.end(), [](int i){return i > 1;});
std::cout << std::endl;