本程序能将运算式从中缀表达式转换为后缀表达式，并计算运算式的值。暂时仅可计算正整数之间的运算。暂时无法处理负数，要计算负数请用 (0-n) 的形式。输入仅含数字0~9及+、-、*、/、(、)的式子，并在结尾处加 # 字作为结束符。-This program can convert an expression from infix expressions to postfix expressions, and calculate the expression value. Calculate the time being, only the operation between the positive integers. Is temporarily unable to process negative, please use to calculate the negative (0-n) form. Input contains only numbers 0 to 9 and+,-,*,/,(,) the subreport, and at the end add# character as a terminator.