定义一个类Fact表示无符号有理数（分数），成员有分子（num）和分母(den)

构造函数2个

一组get方法

一组set方法

方法：

-比较两个分数的大小，结果为boolen的值

-对分数进行约分（分子分母同时除以最大公约数）

-对两个分数进行通分（先约分）

-两个分数相加，结果为不可约数（先通分，然后再约分）

定义testFact类，创建Fact对象，并调用各个方法-The definition of a class of Fact unsigned rational numbers (fractions), members of the molecules (num) and denominator (den)

Constructor 2

Get method

A group set method

Method:

- Compare the size of the two fractions, the result is the value of the boolen

- About points on the score (the numerator and denominator by dividing the greatest common divisor)

- The common denominator (the first about points on two scores)

- The two scores are added, the result is a the irreducible number (first common denominator, and then about points)

The definition testFact class, create Fact objects and call the various methods