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Grokking the Coding Interview Patterns in C#

Basic Calculator

Explore building a basic calculator that handles arithmetic expressions with integers, additions, subtractions, and parentheses. Learn to implement a stack-based solution to correctly parse and evaluate expressions, preparing you to solve similar coding interview problems efficiently in C#.

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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:

  • 1≤1 \leq s.length ≤3×104\leq 3 \times 10^{4}
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