程序运行时，单击“最大公约数”命令按钮，求得所输入的两个数的最大公约数；单击“最小公倍数”命令按钮，求得所输入的两个数的最小公倍数；结果在标签中显示。 -When the program is running, click the "greatest common divisor" command button, and seek the greatest common divisor of two numbers entered click the "lowest common denomi