求最大公约数和最小公倍数的源代码。很简短的求法-Seek the common denominator and least common multiple of the source code. Very brief method

教新手们练习如何调用函数，进一步熟悉最大公约数和最小公倍数之间的转换关系-To teach novices practice how to call the function, to further familiarize themselves with the conversion relationship between the greatest common divisor and least common multiple

a30求两个数的最大公约数和最小公倍数程序简单易懂-A30 seeking the greatest common divisor and least common multiple procedures are simple