shunfurh
编程介的小学生
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2018-12-09 12:19 阅读 519

带错误检查的表达式计算器用C语言怎么实现的呢?

Problem Description
Your task are to write a program that imitates a simple desk calculator. Your calculator must be able to accept an infix expression which at least includes (, ), +, -, *, /,% . If the expression is legal, output its value, else ouput an error message.

Input
There are several test cases, each occupies one line that contains an infix expression. Proceed until the end of the file.

Output
For each test case, in one line the value of that expression ( accurate up to two decimal places), or an error message “ERROR IN INFIX NOTATION”.

Sample Input
4.99+5.99+6.99*1.06
(3*5*(4*8)%2)
1+2(
2/0
2.5%2
2%2.5

Sample Output
18.39
0.00
ERROR IN INFIX NOTATION
ERROR IN INFIX NOTATION
ERROR IN INFIX NOTATION
ERROR IN INFIX NOTATION

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