88 lines
1.7 KiB
C++
88 lines
1.7 KiB
C++
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#include <iostream>
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#include <stdexcept>
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class Vector {
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private:
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int* data;
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size_t size;
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size_t count;
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public:
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Vector();
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~Vector();
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void resize(size_t new_size);
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int& operator[](size_t index);
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size_t get_count() const;
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void push_back(int value);
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};
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// Constructor
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Vector::Vector() : data(nullptr), size(0), count(0) {}
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// Destructor
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Vector::~Vector() {
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delete[] data;
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}
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// Overloaded operator[]
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int& Vector::operator[](size_t index) {
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if (index >= count) {
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std::cout << "index out of range";
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}
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return data[index];
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}
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// get_count() function
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size_t Vector::get_count() const {
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return count;
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}
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// resize() function
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void Vector::resize(size_t new_size) {
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if (new_size > size) {
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int* new_data = new int[new_size];
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for (size_t i = 0; i < count; ++i) {
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new_data[i] = data[i];
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}
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delete[] data;
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data = new_data;
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size = new_size;
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}
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count = new_size;
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}
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// push_back() function
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void Vector::push_back(int value) {
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if (count == size) {
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size_t new_size = size++;
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resize(new_size);
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}
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data[count++] = value;
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}
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int main() {
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Vector vec;
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vec.push_back(1);
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vec.push_back(2);
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vec.push_back(3);
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std::cout << "Vector count: " << vec.get_count() << std::endl;
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for (size_t i = 0; i < vec.get_count(); ++i) {
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std::cout << "vec[" << i << "] = " << vec[i] << std::endl;
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}
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vec.resize(5);
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std::cout << "Vector count after resize: " << vec.get_count() << std::endl;
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for (size_t i = 0; i < vec.get_count(); ++i) {
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std::cout << "vec[" << i << "] = " << vec[i] << std::endl;
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}
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return 0;
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}
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