rationalnumber,rationalmodel

1.1. there is no rational number whose square is 2. 证明 定理1.
multiplying & dividing rational numbers
rational and irrational numbers write down anything you know
首先,我都把数字转化为rationalnumber类型. 整数就是分母为1的分数.
rationalnumber类方法的测试(有理数及真分数的计算)