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73: Square(int len);
74: Square(int len, int width);
75: ~Square(){}
76: long GetPerim() {return 4 * GetLength();}
77: };
78:
79: Square::Square(int len):
80: Rectangle(len,len)
81: {}
82:
83: Square::Square(int len, int width):
84: Rectangle(len,width)
85:
86: {
87: if (GetLength() != GetWidth())
88: cout << Error, not a square a Rectangle??\n;
89: }
90:
91: int main()
92: {
93: int choice;
94: bool fQuit = false;
95: Shape * sp;
96:
97: while (1)
98: {
99: cout << (1)Circle (2)Rectangle (3)Square (0)Quit: ;
100: cin >> choice;
101:
102: switch (choice)
103: {
104: case 1: sp = new Circle(5);
105: break;
106: case 2: sp = new Rectangle(4,6);
107: break;
108: case 3: sp = new Square (5);
109: break;
110: default: fQuit = true;
111: break;
112: }
113: if (fQuit)
114: break;
115:
116: sp->Draw();
117: cout << \n;
118: }
119: return 0;
120: } |
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