Solution: Basic Calculator II
Explore how to evaluate a string mathematical expression containing non-negative integers and operators by using a stack-based approach. Understand the processing of addition, subtraction, multiplication, and division with correct operator precedence. Practice implementing this efficient solution in C++ without relying on built-in evaluation functions.
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Statement
Given a string s representing a mathematical expression containing non-negative integers and the operators +, -, *, and /, evaluate the expression and return its result.
Integer division must truncate toward zero. You may assume the expression is always valid, and all intermediate results fall within the
Note: Using any built-in function that directly evaluates strings as mathematical expressions (e.g.,
eval()) is not allowed.
Constraints:
s.length...