[Leetcode] Basic Calculator II Base Calculator II

Source: Internet
Author: User
Tags integer division

Implement a basic calculator to evaluate a simple expression string.

The expression string contains only non-negative integers,,, + - * , / operators and empty spaces . The integer division should truncate toward zero.

Assume that the given expression was always valid.

Some Examples:

"3+2*2" = 7 "3/2" = 1 "3+5/2" = 5

Note: don't use the eval built-in library function.

Credits:
Special thanks to @ts for adding this problem and creating all test cases.

[Leetcode] Basic Calculator II Base Calculator II

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