如何调用模板函数（使用类模板实现STL Vector）

使用类模板实现STL Vector,点击查看代码 #include <iostream> using namespace std; template<typename T> class MyVector { public: //构造函数 MyVector<T>(int size = 10) { T * _tep = new T[size](); first = _tep; last = _tep; end = first + size;// cout << "构建Vector    
    
    
，首地址" << first << endl; } //拷贝构造 MyVector<T>(const MyVector<T> & _src) { //对方vector是为空 if (_src.Empty()) { int srcVectorySize = _src.getVectorSize(); T * _tep = new T[srcVectorySize](); first = _tep; last = _tep; end = first + srcVectorySize;// cout << "拷贝构造构建Vector,空拷贝" << endl; } else { int srcVectorySize = _src.getVectorSize(); T * _tep = new T[srcVectorySize](); first = _tep; last = _tep; end = first + srcVectorySize;// T * _srcVectorElementPoint = _src.first; while (_srcVectorElementPoint < _src.last) { *_tep = *_srcVectorElementPoint; _tep++; _srcVectorElementPoint++; }//end last=_tep; cout << "拷贝构造构建Vector" << endl; } } //赋值函数 MyVector<T> & operator=(const MyVector<T> & _src) { //避免重复 if (this == &_src) { return *this; } //释放现有堆上资源空间 if (this->Empty() == false) { delete[]first; first = nullptr; last = nullptr; end = nullptr; } int srcVectorySize = _src.getVectorSize(); T * _tep = new T[srcVectorySize](); first = _tep; last = _tep; end = first + srcVectorySize;// T * _srcVectorElementPoint = _src.first; while (_srcVectorElementPoint < _src.last) { *_tep = *_srcVectorElementPoint; _tep++; _srcVectorElementPoint++; }//end last = _tep; cout << "赋值函数构建Vector" << endl; } //析构函数 ~MyVector<T>() { if (Empty() == false) { delete[]first; first = nullptr; last = nullptr; end = nullptr; cout << "析构Vector,堆地址"<<first << endl; } } //添加值,返回指向当前元素的指针,返回为 const * 不允许修改 const T * addValue(const T & _srcValue) { //满空间,两倍扩容 if (Full()) { Expend(); } *last = _srcValue; last++; cout << "Vector添加元素,元素地址" << last << endl; return last; } //获取指定下标的值 T getValue(int index) const { if (index<0) { return *first; } if (index > this->getVectorSize()) { return *(last-1); } int flag = 0; T *elementPoint = first; while (flag < index) { elementPoint++; flag++; } cout << "获取Vector元素值,元素地址" << elementPoint <<"元素值"<< *elementPoint << endl; return *elementPoint; } //编辑指定下标元素的值,返回当前节点的指针 不允许通过返回指针修改 const T * eidtValue(int index,const T & _value) { if (index > this->getVectorSize() || index<0) { return nullptr; } int flag = 0; T *elementPoint = first; while (flag < index) { elementPoint++; flag++; } *elementPoint = _value; cout << "编辑Vector元素值,元素地址" << elementPoint << "元素值" << *elementPoint << endl; return elementPoint; } //判断是否为空 bool Empty() const { if (first == last) { return true; } return false; } //判断空间是否满 bool Full() const{ if (last == end) { return true; } return false; } int getVectorSize() const { return this->end - this->first; } void printVector() const { cout << "打印数组元素" << endl; T *elementPoint = first; int index = 0; while (elementPoint < last) { cout.precision(4); cout << "[" << index << "]=" << (*elementPoint) <<"该元素地址="<< elementPoint << endl; elementPoint++; index++; } } private: T * first; T * last; T * end; //两倍扩容 void Expend() { int size = this->getVectorSize(); int newSize = size * 2; T *newFirst = new T[newSize]; T *newLast = newFirst; T *newEnd = newFirst + newSize; const T *srcElementPoint = this->first; while (srcElementPoint < this->last) { *newLast = *srcElementPoint; newLast++; srcElementPoint++; } //释放原有空间 delete[]first; first = nullptr; last = nullptr; end = nullptr; first = newFirst; last = newLast; end = newEnd; cout << "两倍扩容新堆内存地址"<< first << endl; } }; int main() { MyVector<int> v1 (6) ; v1.addValue(10); v1.addValue(9); v1.addValue(8); v1.addValue(7); v1.addValue(6); v1.addValue(5); v1.printVector(); v1.addValue(4.0); v1.printVector(); v1.eidtValue(2, 100); v1.printVector(); int getValue = v1.getValue(3); cout << "getValue =" << getValue << endl; MyVector<int> v2 = v1; v2.printVector(); MyVector<int> v3(10); v3 = v1; v3.printVector(); system("pause"); return 1; }