iOS 一个很简单的使用类的代码，和.net很像，很好理解

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////  main.m//  0824-func////  Created by panba on 15-8-23.//  Copyright (c) 2015年 panba. All rights reserved.//#import <Foundation/Foundation.h>@interface func:NSObject-(void) print;-(void) setfenzi:(int) n;-(void) setfenmn:(int) m;-(int) N;-(int) M;-(double) num;@end@implementation func{    int fenzin;    int fenmnm;}-(void)print{    NSLog(@"fenzi:%i,fenmn:%i",fenzin,fenmnm);}-(void) setfenzi:(int)n{    fenzin = n;}-(void) setfenmn:(int)m{    fenmnm = m;}-(int) N{    return fenzin;}-(int) M{    return  fenmnm;}-(double) num{    if (fenmnm == 0)    {return NAN;}    else    {        return  fenzin/fenmnm;    }}@endint main(int argc, const char * argv[]) {    @autoreleasepool {        func *afunc = [[func alloc] init];        //func *bfunc = [[func alloc] init];        [afunc setfenzi:1];        [afunc setfenmn:1];        [afunc print];        NSLog(@"=");        NSLog(@"%g",[afunc num]);        //[bfunc setfenzi:1];        //[bfunc setfenmn:0];        //NSLog(@"=");        //NSLog(@"%g",[bfunc num]);    }    return 0;}

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