nyist_xsk

The objective of the program you are going to produce is to evaluate boolean expressions as the one shown next: Expression: ( V | V ) & F & ( F | V )where V is for True, and F is for False. The expre

描述 ACM队的mdd想做一个计算器，但是，他要做的不仅仅是一计算一个A+B的计算器，他想实现随便输入一个表达式都能求出它的值的计算器，现在请你帮助他来实现这个计算器吧。 比如输入：“1+2/4=”，程序就输出1.50（结果保留两位小数） 输入 第一行输入一个整数n，共有n组测试数据（n<10)。 每组测试数据只有一行，是一个长度不超过1000的字符串，表示这个运算式，每个运算式都是以“=

We have learned how to obtain the value of a polynomial when we were a middle school student. If f(x) is a polynomial of degree n, we can let If we have x, we can get f(x) easily. But a computer can no