IOS 小例子，输出一个图形的坐标，颜色，形状－2。

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////  main.m//  0927-inherit////  Created by panba on 15-9-27.//  Copyright (c) 2015年 panba. All rights reserved.//#import <Foundation/Foundation.h>typedef enum{    kyuanxing,    kfangxing,    ktuoyuan} shapeType ;//shapeTypetypedef enum{    kred,    kgreen,    kblue} shapeColor; //shapeColortypedef struct{    int x,y,width,height;}shapeRect; //shapeRecttypedef struct{    shapeType type;    shapeColor color;    shapeRect rect;} Shape; //ShapeNSString *returnTypeName(shapeType typeValue){    switch (typeValue) {        case kfangxing:            return @"fangxing";            break;        case ktuoyuan:            return @"tuoyuan";            break;        case kyuanxing:            return @"yuanxing";            break;        default:            break;    }} //nsstring *returnTypeNameNSString *returnColorName(shapeColor colorValue){    switch (colorValue) {        case kblue:            return @"blue";            break;        case kgreen:            return @"green";            break;        case kred:            return @"red";            break;        default:            break;    }} //nsstirng *returnColorName@interface ClassShape : NSObject{@private    shapeType typeName;    shapeColor colorName;    shapeRect rectName;}-(void) setRect:(shapeRect )ClassRectValue;-(void) setColor:(shapeColor )ClassColorValue;-(void) setType:(shapeType )ClassTyprValue;-(void) draw;@end@implementation ClassShape:NSObject-(void) setRect:(shapeRect )imRectValue{    rectName = imRectValue;}-(void) setColor:(shapeColor)imColorValue{    colorName = imColorValue;}-(void) setType:(shapeType)imTypeValue{    typeName = imTypeValue;}-(void) draw{    NSLog(@"type is %@ at (%i,%i,%i,%i) in %@",returnTypeName(typeName),rectName.x,rectName.y,rectName.width,          rectName.height,returnColorName(colorName));} //draw@end// typeYuanxing:classShape@interface TypeYuanxing : ClassShape@end@implementation TypeYuanxing:ClassShape@end//typeFangxing:classShape@interface TYpeFangxing : ClassShape@end@implementation TYpeFangxing:ClassShape@end//typeTuoyuan:classShape@interface TypeTuoyuan : ClassShape@end@implementation TypeTuoyuan:ClassShape@end//drawshapes  如果这里报//must explicitly descrilbe intended ownersship of an object array parameter，请把arc关掉。void drawshapes(id shapes[],int count){    int i  ;    for (i = 0; i<count; i++) {        id shape = shapes[i];        [shape draw];    }}int main(int argc, const char * argv[]) {    @autoreleasepool {        id shapes[3];//这里使用id类型，因为id可以接受所有 的类型                 shapeRect rect0 = {0,0,100,200};        shapes[0] = [TYpeFangxing new];        [shapes[0] setType:kfangxing];        [shapes[0] setColor:kred];        [shapes[0] setRect:rect0];                shapeRect rect1 = {20,30,40,50};        shapes[1] = [TypeYuanxing new];        [shapes[1] setType:kyuanxing];        [shapes[1] setColor:kgreen];        [shapes[1] setRect:rect1];                shapeRect rect2 = {10,23,50,88};        shapes[2] = [TypeTuoyuan new];        [shapes[2] setType:ktuoyuan];        [shapes[2] setColor:kblue];        [shapes[2] setRect:rect2];                drawshapes(shapes, 3);    }    return 0;}
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