OC 对象和函数

#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;

}