BASED 4_1_1

//Base.h
#ifndef BASE_H
#define BASE_H
#include <vector>
class Base{
protected:
    std::vector<int> arr;
};
#endif
//class1.h
#ifndef CLASS1_H
#define CLASS1_H
#include "Base.h"
#include <vector>
class class1: protected virtual Base{
protected:
    void input();
};
#endif
//class2.h
#ifndef CLASS2_H
#define CLASS2_H
#include "Base.h"
#include <vector>
class class2: protected virtual Base{
protected:
    void sort();
    void print(bool is_endl=true);
};
#endif
//class3.h
#ifndef CLASS3_H
#define CLASS3_H
#include "class2.h"
#include "class1.h"
#include <vector>
class class3: private class1,private class2{
public:
    void call();
};
#endif
//class1.cpp
#include "class1.h"
#include <vector>
#include <iostream>
using namespace std;
void class1::input(){
    int s;
    cin>>s;
    arr.resize(s);
    for(int i=0;i<arr.size();i++) cin>>arr[i];
}
//class2.cpp
#include "class2.h"
#include <vector>
#include <iostream>
#include <iomanip>
#include <algorithm>
void class2::sort(){
    std::sort(arr.begin(),arr.end());
}
void class2::print(bool is_endl){
    for(auto el: arr) std::cout<<std::setw(5)<<el;
    (is_endl)?std::cout<<"\n":std::cout<<"";
}
//class3.cpp
#include "class3.h"
#include <iostream>
using std::cout;
void class3::call(){
    input();
    cout<<"Array dimension: "<<arr.size()<<'\n';
    cout<<"The original array:";
    print();
    sort();
    cout<<"An ordered array:";
    print(0);
}
//main.cpp
#include "class3.h"
int main()
{
    class3 c3;
    c3.call();
    return(0);
}