用C写的多项式求解，用栈实现；判断读入的字符不是数字，是则进栈，然后判断它的下一个是不是数字，是就将数字栈里的顶元素退出并*10在加上该元素回栈-The polynomial written in C, with a stack implementation, the judge read into the character is not a number is the stack then determine the next it is not digital, will exit th