从0开始学习OC程序-第2天

对象和函数

基本数据类型，赋值改的是本身
引用数据类型，赋值改的是指针

#import <Foundation/Foundation.h>@interface Car : NSObject{    @public    int wheels;    int speed;}-(void)run;@end@implementation Car-(void)run{    NSLog(@"汽车有%d个轮子,时速是%dkm/h",wheels,speed);}@endvoid configWheelsAndSpeed(int wheels,int speed){    wheels = 3;    speed = 100;}void configCar(Car *car){    car->wheels = 3;    car->speed = 100;}int main(){    Car *car = [Car new];    car->wheels = 4;    car->speed = 240;    configWheelsAndSpeed(car->wheels,car->speed);    [car run];    configCar(car);    [car run];    return 0;}