第五讲：练习（基本语法）
Dog.h#import <Foundation/Foundation.h>
@interface Dos:NSObject
{
@protected
int ID;
@public
int age;
@private
float price
}
- (id) init;
- (id) intWithID:(int)newID;
- (id) intWithID:(int)newID andAge:(int)newAge;
- (id) intWithID:(int)newID andAge:(int)newAge andPrice(float)newPrice;
- (void) setID:(int)newID;
- (int) getID;
- (void) setAge:(int)newAge;
- (int) getAge;
- (void) setPrice:(float)newPrice;
- (float) getPrice;
- (void)setID:(int)newID andAge:(int)newAge;
- (void)setID:(int)newID andAge:(int)newAge andPrice:(float)newPrice;
@end
Dog.m
#import "Dog.h"
@implenentation Dog
- (id) init
{
self = ;
if(self){
ID = 1;
age = 2;
price = 60.0f;
}
return self;
//return ;
}
- (id) initWithID:(int)newID
{
self = ;
if(self){
ID = newID;
age = 2;
price = 60.0f;
}
return self;
//return ;
}
- (id) initWithID:(int)newID andAge:(int)newAge
{
self = ;
if(self){
ID = newID;
age = newAge;
price = 60.0f;
}
return self;
//return ;
}
- (id) initWithID:(int)newID andAge:(int)newAge andPrice(float)newPrice
{
self = ;
if(self){
ID = newID;
age = newAge;
price = newPrice;
}
return self;
}//最终的构造函数
- (void)setID:(int)newID
{
ID = newID;
}
- (int)getID
{
return ID;
}
- (void)setAge:(int)newAge
{
age = newAge;
}
- (int)getAge
{
return age;
}
- (void)setPrice:(float)newPrice
{
price = newPrice;
}
- (float)getPrice
{
return price;
}
- (void)setID:(int)newID andAge:(int)newAge
{
ID = newID;
age = newAge;
}
- (void)setID:(int)newID andAge:(int)newAge andPrice(float)newPrice
{
ID = newID;
age = newAge;
price = newPrice;
}
@end
main.m
#import <Foundation/Foundation.h>
#import "Dog.h"
int main(int argc, const char * argv[])
{
@autoreleasepool{
Dog *dog1 = ;
;
int ID = ;
int age = ;
float price = ;
printf("dog1 id is %d age is %d price is %f \n",ID,age,price);
// dog1 id is 1 age is 2 price is 60.0000
Dog *dog2 = [ initWithID:100 andAge:36 andPrice:68.88];
int ID = ;
int age = ;
float price = ;
printf("dog2 id is %d age is %d price is %f \n",ID,age,price);
//dog2 id is 100 age is 36 price is 68.879997
Dog *dog2 = [ setID:2012 andAge:38 andPrice:87.2];
int ID = ;
int age = ;
float price = ;
printf("dog2 new id is %d age is %d price is %f \n",ID,age,price);
//dog2 net id is 2012 age is 38 price is 87.19998
}
return 0
}
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