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C++ Programming Ch.9 Exercise 10 Solution

Problem: κ°„λ‹¨ν•œ κ·Έλž˜ν”½ νŽΈμ§‘κΈ°λ₯Ό μ½˜μ†” λ°”νƒ•μœΌλ‘œ λ§Œλ“€μ–΄λ³΄μž. κ·Έλž˜ν”½ νŽΈμ§‘κΈ°μ˜ κΈ°λŠ₯은 "μ‚½μž…", "μ‚­μ œ", "λͺ¨λ‘λ³΄κΈ°", "μ’…λ£Œ" 의 4가지이고, μ‹€ν–‰ 과정은 λ‹€μŒκ³Ό κ°™λ‹€. Objective & Hints: 좔상 클래슀, 상속 μ’…ν•© μ‘μš© Shapeκ³Ό 이λ₯Ό 상속받은 Circle, Line,Rect ν΄λž˜μŠ€λŠ” [κ·Έλ¦Ό9-13]을 μ΄μš©ν•˜κ³  ν•„μš”ν•œ ν΄λž˜μŠ€μ™€ main() ν•¨μˆ˜λ₯Ό μž‘μ„±ν•˜λΌ. 전체 ν”„λ‘œκ·Έλž¨μ€ λŒ€λž΅ μ•„λž˜μ™€ 같이 κ΅¬μ„±λœλ‹€. Code: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 #include #include<stdlib.h> using namespace std; class UI { public: static int show_menu() { int num; cout << "μ‚½μž…:1, μ‚­μ œ:2, λͺ¨λ‘λ³΄κΈ°:3, μ’…λ£Œ:4 >>" ; cin >> num; return num; } static int input_shape() { int num; cout << "μ„ :1, 원:2, μ‚¬κ°ν˜•:3 >> "; cin >> num; return num; } static int del_index() { int num; cout << "μ‚­μ œν•˜κ³ μž ν•˜λŠ” λ„ν˜•μ˜ 인덱슀 >> "; cin >> num; return num; } }; class Shape { // Node Shape* next; protected: virtual void draw() { cout << "--Shape--" << endl; } public: Shape() { next = NULL; } virtual ~Shape() {} Shape* add(Shape* p) { this->next = p; return p; } Shape* getNext() { return next; } void paint() { draw(); } void setNext(Shape *p) { this->next = p->next; } }; class Line : public Shape { public: virtual void draw() { cout << "Line" << endl; } }; class Circle : public Shape { public: virtual void draw() { cout << "Circle" << endl; } }; class Rect : public Shape { public: virtual void draw() { cout << "Rectangle" << endl; } }; class GraphicEditor { // List int node_size; Shape* pStart; Shape* pLast; public: GraphicEditor() { pStart = NULL; node_size = 0; } int run() { cout << "κ·Έλž˜ν”½ μ—λ””ν„°μž…λ‹ˆλ‹€.\n"; while(true){ int num; num = UI::show_menu(); switch (num){ case 1:{ num = UI::input_shape(); input_new(num); break; } case 2:{ if(pStart == NULL){ cout << "List Empty\n"; break; } num = UI::del_index(); del(num); break; } case 3:{ show(); break; } case 4:{ exit(0); } default : cout << "메뉴λ₯Ό 잘λͺ» μ„ νƒν•˜μ…¨μŠ΅λ‹ˆλ‹€.\n"; } } } void input_new(int n) { switch (n){ case 1: { if(node_size == 0) { pStart = new Line(); pLast = pStart; } else pLast = pLast->add(new Line()); node_size++; break; } case 2: { if(node_size == 0){ pStart = new Circle(); pLast = pStart; } else pLast = pLast->add(new Circle()); node_size++; break; } case 3: { if(node_size == 0){ pStart = new Rect(); pLast = pStart; } else pLast = pLast->add(new Rect()); node_size++; break; } default : cout << "메뉴λ₯Ό 잘λͺ» μ„ νƒν•˜μ…¨μŠ΅λ‹ˆλ‹€.\n"; } } bool del(int n) { int k=0; Shape* target_node = pStart; Shape* priv_node; if(n == 0){ pStart = pStart->getNext(); delete target_node; } else{ while( (target_node != NULL) && (k < n)){ priv_node = target_node; target_node = target_node->getNext(); k++; } if(target_node == NULL){ cout << "μ—†λŠ” λ…Έλ“œμž…λ‹ˆλ‹€.\n"; return false; } else { priv_node->setNext(target_node); delete target_node; } } node_size--; } void show() { Shape* p = pStart; int i=0; if(p == NULL) cout << "List Empty\n"; else while(p != NULL){ cout << i << ": "; p->paint(); p = p->getNext(); i++; } } }; int main() { GraphicEditor* g_editor = new GraphicEditor; g_editor->run(); delete g_editor; } Explanation: ...

November 26, 2019 Β· 4 min Β· Sobamemil