@interface Car : NSObject{
@public
int _wheels;
int _speed;
}
- (void)run;
@end
@implementation Car
- (void)run{
NSLog(@"%d个轮子, 速度为%d的车子跑起来了", _wheels, _speed);
}
@end
void test1(Car *newCar){
newCar->_wheels = 5;
}
void test2(Car *newCar);
int main(int argc, const char * argv[]) {
Car *c1 = [[Car alloc] init];
Car *c2 = [[Car alloc] init];
test1(c1);
test2(c2);
[c1 run];
[c2 run];
return 0;
}
void test2(Car *newCar){
newCar->_wheels = 4;
newCar->_speed = 300;
}