摘要: 1.各个方法的实现 1 - (Fraction *) subtract: (Fraction *) f 2 { 3 Fraction *result = [[Fraction alloc] init]; 4 5 result.numerator = numerator *f... 阅读全文
posted @ 2014-11-08 22:16 MingMing-King 阅读(1559) 评论(0) 推荐(0) 编辑