Solution: Basic Calculator
Explore how to solve arithmetic expressions with +, -, and nested parentheses by applying the stack pattern in C++. Learn to process each character, manage intermediate results on stacks, and evaluate subexpressions step-by-step while understanding time and space complexity.
Statement
Given a string containing an arithmetic expression, implement a basic calculator that evaluates the expression string. The expression string can contain integer numeric values and should be able to handle the “+” and “-” operators, as well as “()” parentheses.
Constraints:
Let s be the expression string. We can assume the following constraints:
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s.length