Object-c 学习之路一（Hello world）
本人从今天开始学习oc 了心里灰常高兴，写了个hello world 留作纪念。
//// main.m// OcStart//// Created by WildCat on 13-3-25.// Copyright (c) 2013年 wildcat. All rights reserved.//#import <Foundation/Foundation.h>#import "Person.h"#import "Rectangle.h"#import "Square.h"int main(int argc, const char * argv[]){ @autoreleasepool { // insert code here... NSLog(@"Hello, World!"); NSLog(@"李兴乐你好！！"); //定义一个Person类 Person * p=[[Person alloc] init]; [p setStr:@"李兴乐"]; [p myPrint]; //定义一个Rectangle类对象 Rectangle *r=[[Rectangle alloc] init]; [r setWidth:3 setGeight:4]; int area=[r getArea]; int perimeter=[r gePerimeter]; NSLog(@"The Area is:%d ,the parimeter is %d",area,perimeter); //定义一个Square实例对象 Square *s=[[Square alloc] init]; //键盘输入正方型的边长 NSLog(@"请输入正方形的边长"); int number; scanf("%i",&number); //设置边长 [s setSide:number]; int side=[s side]; int areas=[s getArea]; int perimeters=[s gePerimeter]; NSLog(@"The square's side is :%d ,the area is : %d ,the primeter is : %d",side,areas,perimeters); NSString *hello=@"sdfgdsf"; //转换为大写 hello=[hello uppercaseString]; NSLog(hello); //调用字符串的求长度方法 NSLog(@"The String length is : %ld",[hello length]); } return 0;}