#include
#include
//接口
#ifndef Interface
#define Interface struct
#endif
//類
#ifndef Class
#define Class struct
#endif
//抽象形狀類
Class Shape;
typedef Class Shape shape;
//抽象形狀類的方法聲明
shape* Shape(int edges);
int shape_getEdges(shape *);
int shape_getArea(void);
void _Shape(shape *);
//三角形類
Class Triangle;
typedef Class Triangle triangle;
//三角形類的方法聲明
triangle * Triangle(int bottom, int height);
int triangle_getEdges(triangle *);
int triangle_getArea(triangle *);
void _Triangle(triangle *);
//矩形類
Class Rectangle;
typedef Class Rectangle rectangle;
//矩形類的方法聲明
rectangle * Rectangle(int bottom, int height);
int rectangle_getEdges(rectangle *);
int rectangle_getArea(rectangle *);
void _Rectangle(rectangle *);
//抽象形狀類實現
Class Shape
{
int edges;
int (*getEdges)(shape*);
int (*getArea)(void);
};
//形狀類構造函數
shape* Shape(int edges)
{
shape * obj = (shape *) malloc(sizeof(shape));
obj->edges = edges;
obj->getEdges = shape_getEdges;
obj->getArea = shape_getArea;
return obj;
}
int shape_getEdges(shape* obj)
{
return obj->edges;
}
int shape_getArea(void)
{
return -1;
}
//形狀類析構函數
void _Shape(shape * obj)
{
if(obj == NULL)
return;
free(obj);
}
//三角形類實現
Class Triangle
{
shape * super;
int bottom;
int height;
int (*getEdges)(triangle *);
int (*getArea)(triangle *);
};
//三角形類構造函數
triangle * Triangle(int bottom, int height)
{
triangle* obj = (triangle*) malloc(sizeof(triangle));
//調用Shape構造函數用于實現繼承
obj->super = Shape(3);
obj->bottom = bottom;
obj->height = height;
obj->getEdges = triangle_getEdges;
obj->getArea = triangle_getArea;
return obj;
}
int triangle_getEdges(triangle * obj)
{
return obj->super->edges;
}
int triangle_getArea(triangle * obj)
{
return (obj->bottom * obj->height) / 2;
}
//三角形類析構函數
void _Triangle(triangle * triangle)
{
_Shape(triangle->super);
if(triangle == NULL)
{
return;
}
free(triangle);
}
//矩形類實現
Class Rectangle
{
shape * super;
int bottom;
int height;
int (*getEdges)(rectangle *);
int (*getArea)(rectangle *);
};
//矩形類構造函數
rectangle * Rectangle(int bottom, int height)
{
rectangle * obj = (rectangle *)malloc(sizeof(rectangle));
//調用Shape構造函數用于實現繼承
obj->super = Shape(4);
obj->bottom = bottom;
obj->height = height;
obj->getEdges = rectangle_getEdges;
obj->getArea = rectangle_getArea;
return obj;
}
int rectangle_getEdges(rectangle * obj)
{
return obj->super->edges;
}
int rectangle_getArea(rectangle * obj)
{
return (obj->bottom * obj->height);
}
//矩形類析構函數
void _Rectangle(rectangle * obj)
{
_Shape(obj->super);
if(obj == NULL)
{
return;
}
free(obj);
}
//測試
void main(){
shape* shapeObj = Shape(0);
printf("%d\n", shapeObj->getEdges(shapeObj));
printf("%d\n", shapeObj->getArea());
_Shape(shapeObj);
triangle* triangleObj = Triangle(4, 5);
printf("%d\n", triangleObj->getEdges(triangleObj));
printf("%d\n", triangleObj->getArea(triangleObj));
_Triangle(triangleObj);
rectangle* rectangleObj = Rectangle(4, 5);
printf("%d\n", rectangleObj->getEdges(rectangleObj));
printf("%d\n", rectangleObj->getArea(rectangleObj));
_Rectangle(rectangleObj);
}
)
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