本程序实现判断两个大数之间是否互素，例如大数A和大数M，在程序运行之后会显示A和M是否互素，A是否存在模M的逆元，并且显示出程序运行所需要的时间。-This program is used to judge whether two large numbers are mutually prime numbers.For example,A and M are large numbers , when we run the program ,we will see whether A and M