Objective-c 面向对象画图形(此程序不符合内存管理规则)

在同一个文件中，没有分割出来

#import <Foundation/Foundation.h>// --------------------------------------------------// constants for the different kinds of shapes and their colorstypedef enum {kRedColor,kGreenColor,kBlueColor} ShapeColor;// --------------------------------------------------// Shape bounding rectangle//声明结构用于形状边界//为什么用结构来定义边界，因为结构可以方便的使用//例：ShapeRect rect_0 = {0, 0, 1, 1};typedef struct {int x, y, width, height;} ShapeRect;// --------------------------------------------------// convert from the ShapeColor enum value to a human-readable nameNSString *colorName (ShapeColor color);NSString *colorName (ShapeColor color){switch (color) {case kRedColor:return @"red";break;case kGreenColor:return @"green";break;case kBlueColor:return @"blue";break;}return @"no clue";} // colorName// --------------------------------------------------// All about Circles@interface Circle : NSObject{    ShapeColor  fillColor;    ShapeRect   bounds;}- (void) setFillColor: (ShapeColor) fillColor;- (void) setBounds: (ShapeRect) bounds;- (void) draw;@end // Circle@implementation Circle- (void) setFillColor: (ShapeColor) c{fillColor = c;} // setFillColor- (void) setBounds: (ShapeRect) b{bounds = b;} // setBounds- (void) draw{NSLog (@"drawing a circle at (%d %d %d %d) in %@",   bounds.x, bounds.y,    bounds.width, bounds.height,   colorName(fillColor));} // draw@end // Circle// --------------------------------------------------// All about Rectangles@interface Rectangle : NSObject{ShapeColorfillColor;ShapeRectbounds;}- (void) setFillColor: (ShapeColor) fillColor;- (void) setBounds: (ShapeRect) bounds;- (void) draw;@end // Rectangle@implementation Rectangle- (void) setFillColor: (ShapeColor) c{fillColor = c;} // setFillColor- (void) setBounds: (ShapeRect) b{bounds = b;} // setBounds- (void) draw{NSLog (@"drawing a rectangle at (%d %d %d %d) in %@",   bounds.x, bounds.y,    bounds.width, bounds.height,   colorName(fillColor));} // draw@end // Rectangle// --------------------------------------------------// All about OblateSphereoids@interface OblateSphereoid : NSObject{ShapeColorfillColor;ShapeRectbounds;}- (void) setFillColor: (ShapeColor) fillColor;- (void) setBounds: (ShapeRect) bounds;- (void) draw;@end // OblateSphereoid@implementation OblateSphereoid- (void) setFillColor: (ShapeColor) c{fillColor = c;} // setFillColor- (void) setBounds: (ShapeRect) b{bounds = b;} // setBounds- (void) draw{NSLog (@"drawing an egg at (%d %d %d %d) in %@",   bounds.x, bounds.y,    bounds.width, bounds.height,   colorName(fillColor));} // draw@end // OblateSphereoid// --------------------------------------------------// Draw the shapesvoid drawShapes (id shape, int count);void drawShapes (id shape, int count) // 注意，这里和书上不同，上上为 id shapes[]，但在xcode4.2中编译错误，抛Must explicitly describe intended ownership of an object array parameter{[shape draw];} // drawShapes// --------------------------------------------------// The main function.  Make the shapes and draw themint main (int argc, const char * argv[]) {id shapes[3];ShapeRect rect0 = { 0, 0, 10, 30 };shapes[0] = [Circle new];[shapes[0] setBounds: rect0];[shapes[0] setFillColor: kRedColor];drawShapes (shapes[0], 3);    ShapeRect rect1 = { 30, 40, 50, 60 };shapes[1] = [Rectangle new];[shapes[1] setBounds: rect1];[shapes[1] setFillColor: kGreenColor];    drawShapes (shapes[1], 3);ShapeRect rect2 = { 15, 19, 37, 29 };shapes[2] = [OblateSphereoid new];[shapes[2] setBounds: rect2];[shapes[2] setFillColor: kBlueColor];    drawShapes (shapes[2], 3);return (0);} // main