cpp.zip_operation

// Iterator #include <iostream> #include <iomanip> #include <string> using namespace std; template<class T, long N> //vektor sablon, amely megvalositja a belso iterator osztalyt class Vector { T data[N]; public: class iterator //iterator inner class, a megfelelo metodusokat meg kell valositani { public: iterator() : _p(0) {} //default konstruktor iterator objektum letrehozasara iterator(const iterator &it) : _p(it._p) {} //copy konstruktor iterator objektum T& operator*() { return *_p; } //dereferencia T* operator->() { return _p; } iterator& operator++() { ++_p; return *this; } //prefix iterator lepteto muvelet iterator operator++(int) { iterator temp(*this); ++_p; return temp; } //postfix iterator lepteto muvelet bool operator==(const iterator &it) { return _p == it._p; } //logikai egyenlo muvelet bool operator!=(const iterator &it) { return _p != it._p; } //logikai nem egyenlo muvelet private: iterator(T* p) : _p(p) {} //private konstruktor, ami megfelelo elemre allitja az iteratort T* _p; //az iterator altal mutatott elem friend class Vector<T,N>; //Vector sablon friend definicioja, hogy hasznalhassuk a tipus parametereit iteratoron belul is }; iterator begin() { return iterator(data); } //egy iterator eloallitasa, ami a vektor elso elemere mutat iterator end() { return iterator(data + N); } //egy iterator eloallitasa, ami a vektor utolso eleme utani poziciora mutat Vector<T,N>& operator=(const Vector<T,N>& v) { //vektor ertekadas for (long i = 0; i < N; ++i) data[i] = v[i]; return *this; } T operator[](long i) const { return data[i]; } //index operatorok feluldefinialasa T& operator[](long i) { return data[i]; } }; template<class T, long N> void init(Vector<T,N>& v) { //vektor feltoltese veletlen elemekkel typename Vector<T,N>::iterator it; for (it = v.begin(); it != v.end(); ++it) *it = rand() % 100; } template<class T, long N> void print(string s, Vector<T,N>& v) { //vektor kiiratasara szolgalo fuggveny cout << s; typename Vector<T,N>::iterator it; for (it = v.begin(); it != v.end(); ++it) cout << setw(4) << *it; cout << endl; } int main() { srand(time(0)); Vector<int,5> v; init(v); print("v = ", v); return 0; }