Verifying array values with C++11 range based loop? [Without vectors]

I have an assignment that requires the program to read in 20 numbers from a user input into an array. The conditions require the value to be in between 10-100 and non repeated. However, it's not supposed to prompt the user and simply doesn't store the value; finally the program has to print out the user's values that were unique. Proper results For example:

input = 9 10 15 15 15 0
output = 10 15
//this is a small example with a 6 element array instead of 20

When I test my program I only get

input: 9 10 15 15 15 0
output: 10 15 15 15
//this is a small example with a 6 element array instead of 20

I wrote the code using a range-based loop to check the values and set the value to 0 if it doesn't fulfill the conditions. So anything that isn't zero wouldn't be printed out. I've gone through all the questions on stack overflow and I couldn't find an answer to my specific problems:

• How to initialize all array element to zero using class constructors.


• Making it "static" so that when I run another function previous array values are global and maintained from the user input.


• 
  

  Something seems wrong about the loop I created but it looks perfect. I checked with my classmates and they agreed too.

  
  

  
  //arrayinput.h
  #include <array>
  #include <string>
  
  class arrayelimination
  {
  public:
      const static size_t limit = 20; 
      arrayelimination();
      void inputArray();
      void displayArray();
  
  private:
      std::array < int , limit > store;
      int userinput;
  };
  
  
  
  //arrayinput.cpp
  #include <iostream>
  #include <array>
  #include "arrayinput.h"
  using namespace std;
  
  arrayelimination::arrayelimination()
  {
  array < int , limit> store = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  }
  
  
  void arrayelimination::inputArray()
  {
  
  for ( size_t i = 0; i < store.size(); i++)
  {
      cout << "Enter number between 10-100 for array box [" 
          << i << "]: " ;
      cin >> userinput;
  //check if numbers is between 10-100
          if (userinput >= 10 && userinput <= 100)
      {
          //MOST LIKELY ERROR check if number has previously been used.
              for ( int &check : store) 
              {
                     if ( check != userinput)
                  {
                      store[i] = userinput;
                      break;
                  }
                  else
                      store[i] = 0;
  
              }
      }
  
      //output if number isn't between 10-100
  else 
      store[i] = 0;
  
  }
  }
  
  void arrayelimination::displayArray()
  {
          cout << "Your unique array numbers stored include...\n";
      //output all the unique numbers that the user inputted.  
  for ( size_t j = 0;  j < 20; j++)
  {
  //if the value is NOT 0, output.
      if (store[j] != 0)
      {
          cout << "array[ " << j << " ] = " << store[j] << "\n";
      }   
  }
  }
  
  

When I test my program I only get

input: 10 15 15 15 2 0 0 0 0 0 0 0 ... 0
output: 10 15 15 15

The concept of setting it to zero works but the repeated values aren't unique.

I have to use an object-oriented design as a requirement to this assignment. I'm near a dead-end I really don't know how this work. Please help me.