main.m

//編輯字體大小command + <
//編譯執行快捷鍵 com + R
#import <Foundation/Foundation.h>
#import "Iphone.h"


int main(int argc, const char * argv[])
{
    Iphone * phone = [Iphone new];
    phone->_ram = 512;
    phone->_cpu = 1.5;

    int year = 2015;
    int month = 7;
    int day = 15;
    NSLog(@"Hello, World %d %d %d %@!",year,month,day,@"今天開學了");
    printf("hello world %d %d %d\n",year,month,day);
   
    
     return 0;
    
}

iphone.h

#import <Foundation/Foundation.h>

@interface Iphone : NSObject
{
    [email protected] 被修飾的成員變量,在類的外部能夠直接訪問
    @public
    float _cpu;//用來存儲CPU的大小
    float _ram;//用來存儲內部容量大小
}//專門用來聲明成員變量

- (void)aboutMyPhone;


-(void)sendMessag:(char *)content;

-(void)sendMessag:(char *)content andPhoneNumber:(char *)phoneNumber;

-(void)sendMessagWithMessageContent:(char *)messageContent andPhoneNumber:(char *)phoneNumber;
//2.類方法

@end

iphone.m

#import "Iphone.h"

@implementation Iphone


-(void)aboutMyPhone{

//    NSLog(@"aboutMyPhone已經實現了");
    

    NSLog(@"phone cpu %.2f,ram %.2f",_cpu,_ram);
}

-(void)sendMessag:(char *)content
{
    NSLog(@"%s",content);
}

-(void)sendMessag:(char *)content andPhoneNumber:(char *)phoneNumber
{
    NSLog(@"給%s發送消息%s",phoneNumber,content);
}
-(void)sendMessagWithMessageContent:(char *)messageContent andPhoneNumber:(char *)phoneNumber
{
    NSLog(@"給%s發送消息%s",phoneNumber,messageContent);
}


//重寫description方法
-(NSString *)description
{
    //優化 return [NSString stringWithFormat:@"我的cpu=%.1f我的內部存儲是=%.1fMB",_cpu,_ram];
    NSString *result = [NSString stringWithFormat:@"我的cpu=%.1f我的內部存儲是=%.1fMB",_cpu,_ram];
    return result;
    return @"ffffffff";
}

@end

設計一部iphone手機用面向對象的方法