objectc老师上课例题程序Word格式文档下载.docx

objectc老师上课例题程序Word格式文档下载.docx

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//rectangle=[[Rectanglealloc]init];

rectangle=[Rectanglenew];

//开辟空间并初始化

//[rectanglesetLength:

1.23];

//[rectanglesetWidth:

2.34];

[rectanglesetWidth:

1.23andLength:

[rectangleperemeter];

[rectanglearea];

}

return0;

}

16号例三

//Rectangle.h

//Test3

@interfaceRectangle:

NSObject

@propertydoublelength,width;

-（void）peremeter;

-（void）area;

@end

//Rectangle.m

@implementationRectangle

@synthesizelength,width;

-（void）peremeter{

NSLog（@"

周长为：

%g"

2*（length+width））;

-（void）area{

面积为：

length*width）;

rectangle=[[Rectanglealloc]init];

[rectanglesetLength:

2.2];

17号例一

//Circle.h

//Test1

//Createdbyuser16on13-11-17.

@interfaceCircle:

@propertydoubleradius;

-（void）perimeter;

//Circle.m

Circle.h"

@implementationCircle

@synthesizeradius;

-（void）perimeter{

2*3.14*radius）;

3.14*radius*radius）;

Circle*circle;

circle=[[Circlealloc]init];

[circlesetRadius:

1.2];

[circleperimeter];

[circlearea];

17号例二

//Rectangle.h

@classXYPoint;

-（void）setLength:

（double）landWidth:

（double）w;

-（void）setPoint:

（XYPoint*）point;

-（XYPoint*）getPoint;

XYPoint*xyPoint;

（double）landWidth:

（double）w{

length=l;

width=w;

-（void）perimeter{

2*（length+width））;

（XYPoint*）point{

xyPoint=point;

-（XYPoint*）getPoint{

returnxyPoint;

@end

//Square.h

@interfaceSquare:

Rectangle

-（void）setSide:

（double）s;

//Square.m

Square.h"

@implementationSquare

-（void）setSide:

（double）s{

[selfsetLength:

sandWidth:

s];

重写后的周长：

4*[selflength]）;

Square*square;

square=[[Squarealloc]init];

[squaresetSide:

4];

[squareperimeter];

[squarearea];

//Rectangle.m

17号例三

//XYPoint.h

@interfaceXYPoint:

@propertyintx,y;

-（void）setX:

（int）xValandSetY:

（int）yVal;

//XYPoint.m

XYPoint.h"

@implementationXYPoint

@synthesizex,y;

（int）xValandSetY:

（int）yVal{

x=xVal;

y=yVal;

XYPoint*point;

point=[[XYPointalloc]init];

[pointsetX:

25andSetY:

25];

[rectanglesetPoint:

point];

矩形的原点为（%i,%i）"

[[rectanglegetPoint]x],rectangle.getPoint.y）;

17号例四

//People.h

//Test4

@interfacePeople:

-（void）catch:

（id）obj;

//People.m

People.h"

@classDog;

@classCat;

@implementationPeople

（id）obj{

//Cat.h

@interfaceCat:

-（void）yell;

//Cat.m

Cat.h"

@implementationCat

-（void）yell{

喵喵喵。

。

"

）;

//Dog.h

@interfaceDog:

//Dog.m

Dog.h"

@implementationDog

旺旺旺。

Dog*dog=[[Dogalloc]init];

Cat*cat=[[Catalloc]init];

People*p=[[Peoplealloc]init];

[pcatch:

dog];

[dogyell];

[catyell];

iddataVal;

dataVal=dog;

[dataValyell];

dataVal=cat;

18号例一

//Createdbyuser16on13-11-18.

-（XYPoint*）initPointSetX:

（int）xValandSetY:

（int）xValandY:

-（NSString*）description;

//XYPoint.m

（int）yVal{

self=[superinit];

if（self）{

returnself;

-（NSString*）description{

return[NSStringstringWithFormat:

@"

点为：

（%i,%i）"

x,y];

point=[XYPointalloc];

point=[pointinit];

XYPoint*point2;

point2=[[XYPointalloc]initPointSetX:

12andSetY:

point2.x,[point2y]）;

18号例二

//XYPoint.h

//Te