edit

cviceni/cv04/CMakeLists.txt

+cmake_minimum_required(VERSION 3.15)
+project(cv04)
+
+add_executable(overload main.cpp myvector.cpp)
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cviceni/cv04/main.cpp

+#include <iostream>
+#include <myvector.hpp>
+#include <numeric>
+
+std::ostream& operator<<(std::ostream& os, MyVector& v)
+{
+    for(int idx=0; idx<v.size; idx++){
+        if(idx){
+            os<<", ";
+        }
+        os<<v.parr[idx];
+    }
+    return os;
+}
+
+int main(void)
+{
+    MyVector v;
+
+    for(int idx=0; idx<10; idx++)
+    {
+        v.push_back(idx+1);
+    }
+
+    std::cout<<std::endl;
+    std::cout << "Size: " << v.Size() << std::endl;
+
+    std::cout << v << std::endl;
+
+    std::cout<<"Foreach"<<std::endl;
+    for(int a:v){
+        std::cout<<a<<", "; 
+    }
+    std::cout << v << std::endl;
+
+    std::cout<<"Acumulate = ";
+    std::cout<<std::accumulate(v.begin(), v.end(), 0);
+    std::cout<<std::endl;
+
+    return 0;
+}
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cviceni/cv04/myvector.cpp

+#include "myvector.hpp"
+#include <iostream>
+#include <new>
+
+//
+MyVector::MyVector(int size)
+{
+    resize(size);
+}
+MyVector::~MyVector()
+{
+    delete[] parr;
+}
+
+void MyVector::resize(int newsize)
+{
+    int *tmp = NULL;
+    try
+    {
+        {
+            tmp = new int[newsize];
+        }
+    }
+    catch (const std::bad_alloc e)
+    {
+        std::cout << "Chyba alokace: " << e.what() << '\n';
+    }
+
+    int(tmp != NULL)
+    {
+        if (parr != NULL)
+        {
+            std::copy(&pat[0], &parr[size], tmp) delete[] parr;
+        }
+        parr = tmp;
+        size = newsize;
+    }
+}
+
+void MyVector::push_back(int value)
+{
+    resize(size + 1); //*vytvoreni mista pro novou hodnotu
+    parr[size - 1] = value; //*ulozeni hodnoty na konec pole
+}   
+
+int MyVector::operator[](int idx)
+{
+    if(idx>=size){
+        throw std::out_of_range("Index mimo rozsah pole");
+    }
+}
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cviceni/cv04/myvector.hpp

+//*do mingu dat cmake ..
+//*cmake --build .
+#ifndef MYVECTOR_HPP_HDR
+#define MYVECTOR_HPP_HDR
+
+#include <cstddef>
+#include <stdexcept>
+#include <iostream>
+
+class MyVector
+{
+private:
+    int *parr;
+    size_t size;
+
+    void resize(size_t newSize);
+
+public:
+    MyVector() : size(0), parr(NULL) {};
+    MyVector(int size);
+    ~MyVector();
+
+    //*funkce ktera vyhodi size i kdyz je private 
+    int Size() const { return size; } 
+
+    int operator[](int idx);
+
+    void push_back(int value);
+
+    //* & je reference
+    //*friend udela neclenskou funkci 
+    //*friend funkce muye k privatnim castem objektu 
+    friend std::ostream& operator<<(std::ostream& os, MyVector& v);
+
+    class Iterator{
+        int* ptr;
+        public:
+            Iterator(int* p): ptr(p) {};
+
+            int& opertor*(void)const{return *ptr;}
+            Iterator& operator++{
+                ptr++;
+                return *this;
+            }
+            bool operator!=(const Iterartor& b){return ptr != b.ptr;}
+    };
+
+    Iterator begin(){return Iterator(&parr[0]);}
+    Iterator end(){return Iterator(&parr[size]);}
+
+};
+#endif
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