Reimplement class Array from Figs. 10.10—10.11 of the textbook as a class template. Also write a main driver program tha

Post by **answerhappygod** » Mon May 02, 2022 11:42 am

Reimplement class Array from Figs. 10.10—10.11 of the textbook
as a class template. Also write a main driver program that:
Images of the class are below. I guess my biggest thing is - is
this asking for us to 'simplify' the code into a Template? Any help
with this would be great! I see some of the answers, and not all
make a template, neither do they talk about the how and the why.
Help is greatly appreciated!

: Reimplement Class Array From Figs 10 10 10 11 Of The Textbook As A Class Template Also Write A Main Driver Program Tha 1 (72.22 KiB) Viewed 37 times

: Reimplement Class Array From Figs 10 10 10 11 Of The Textbook As A Class Template Also Write A Main Driver Program Tha 2 (378.28 KiB) Viewed 37 times

: Reimplement Class Array From Figs 10 10 10 11 Of The Textbook As A Class Template Also Write A Main Driver Program Tha 3 (246.14 KiB) Viewed 37 times

1 // Fig. 10.10: Array.h 2 // Array class definition with overloaded operators. 3 #ifndef ARRAY_H 4 #define ARRAY_H 5 6 #include <iostream> 7 8 class Array { 9 friend std::ostream& operator<<(std::ostream&, const Array&); TO friend std::istream& operator>>(std::istream&, Array&); 11 12 public: 13 explicit Array(int = 10); // default constructor 14 Array (const Array&); // copy constructor 15 ~Array(); // destructor 16 size_t getSize() const; // return size 17 18 const Array& operator=(const Array&); // assignment operator 19 bool operator==(const Array&) const; // equality operator 20 21 // inequality operator; returns opposite of operator 22 bool operator !=(const Array& right) const { 23 return ! (*this == right); // invokes Array::operator== 24 } 25 26 // subscript operator for non-const objects returns modifiable Ivalue 27 int& operator[](int); 28 29 // subscript operator for const objects returns rvalue 30 int operator[] (int) const; 31 private: 32 size_t size; // pointer-based array size 33 int* ptr; // pointer to first element of pointer-based array 34 }; 35 36 #endif == Fig. 10.10 Array class definition with overloaded operators.
1 // Fig. 10.11: Array.cpp 2 // Array class member- and friend-function definitions. 3 #include <iostream> 4 #include <iomanip> 5 #include <stdexcept> > 6 7 #include "Array.h" // Array class definition 8 using namespace std; ; 9 10 // default constructor for class Array (default size 10) 11 Array::Array (int arraySize) 12 : size{(arraySize > O ? static_cast<size_t>(arraySize) : 13 throw invalid argument{"Array size must be greater than 0"})}, 14 ptr{new int[size]{}} { /* empty body */ } 15 16 // copy constructor for class Array; 17 // must receive a reference to an Array 18 Array::Array(const Array& arrayToCopy) 19 : size{arrayToCopy.size}, ptr{new int[size]} { 20 for (size_t i{0}; i < size; ++i) { 21 ptr = arrayToCopy.ptr; // copy into object 22 } 23 } 24 25 // destructor for class Array 26 Array: :~Array() { 27 delete[] ptr; // release pointer-based array space 28 } 29 30 // return number of elements of Array 31 size_t Array::getSize() const { 32 return size; // number of elements in Array 33 } 34 35 // overloaded assignment operator; 36 // const return avoids: (al = a2) = a3 37 const Array& Array::operator=(const Array& right) { 38 if (&right != this) { // avoid self-assignment 39 // for Arrays of different sizes, deallocate original 40 // left-side Array, then allocate new left-side Array 41 if (size != right.size) { 42 delete[] ptr; // release space 43 size = right.size; // resize this object 44 ptr = new int[size]; // create space for Array copy 45 } } 46 47 for (size_t i{0}; i < size; ++i) { 48 ptr = right.ptr; // copy array into object 49 } 50 } 51 52 return *this; // enables x = y = z, for example 53 } 54 55 // determine if two Arrays are equal and 56 // return true, otherwise return false 57 bool Array::operator==(const Array& right) const { 58 if (size != right.size) { 59 return false; // arrays of different number of elements 60 } 61 62 for (size_t i{0}; i < size; ++i) { 63 if (ptr != right.ptr) { 64 return false; // Array contents are not equal 65 } 66 } 67
69 ug的和722乃B789 68 return true; // Arrays are equal } 70 // overloaded subscript operator for non-const Arrays; 72 // reference return creates a modifiable Ivalue 73 int& Array::operator[](int subscript) { 74 // check for subscript out-of-range error 75 if (subscript < 0 || subscript >= size) { 76 throw out_of_range{"Subscript out of range"}; 77 } return ptr(subscript]; // reference return 80 } 81 82 // overloaded subscript operator for const Arrays 83 // const reference return creates an rvalue 84 int Array::operator[] (int subscript) const { 85 // check for subscript out-of-range error 86 if (subscript < 0 || subscript >= size) { 87 throw out_of_range{"Subscript out of range"}; 88 } 89 90 return ptr(subscript]; // returns copy of this element 91 } 92 93 // overloaded input operator for class Array; 94 // inputs values for entire Array 95 istream& operator>>(istream& input, Array& a) { for (size_t i{0}; i < a.size; ++i) { input >> a.ptr; 98 } 96 97 99 100 return input; // enables cin >> X >> y; 101 } 102 103 // overloaded output operator for class Array 104 ostream& operator<<(ostream& output, const Array& a) { 105 // output private ptr-based array 106 for (size_t i{0}; i < a.size; ++i) { 107 output « a.ptr « " "; 108 } 109 110 output << endl; III return output; // enables cout << x < y; 112} Fig. 10.11 Array class member- and friend -function definitions.