一元多项式求值。用户根据提示输入多项式的最高次数n,变量x的值，以及各个参数；由程序计算多项式的值并将结果输出

-A polynomial evaluation. Follow the prompts to enter the polynomial maximum number of times n, the value of the variable x, and each parameter　computing polynomial values ​ ​ and the results output by the program