oc 类与函数

 

#import <Foundation/Foundation.h>

 

@interface Car : NSObject

{// 成员变量

    @public

    int wheels;

    int speed;

}

 

- (void)run;

@end

 

@implementation Car

- (void)run

{

    NSLog(@"%d个轮子，速度为%dkm/h的车子跑起来", wheels, speed);

}

@end

 

 

void test(int w, int s)

{

    w = 20;

    s = 200;

}

 

void test1(Car *newC)

{

    newC->wheels = 5;

}

 

void test2(Car *newC)

{

    Car *c2 = [Car new];

    c2->wheels = 5;

    c2->speed = 300;

    

    newC = c2;

    newC->wheels = 6;

}

 

int main()

{

    Car *c = [Car new];

    c->wheels = 4;

    c->speed = 250;

    

    //test(c->wheels, c->speed);

    //test1(c);

    test2(c);

    

    [c run];

    

    return 0;

}