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Grokking the Coding Interview Patterns in C++

Solution: Moving Average from Data Stream

Explore how to implement a MovingAverage class in C++ that calculates the moving average of recent integers from a stream using a fixed-size sliding window. Learn to maintain constant time complexity by utilizing a queue and a running sum to efficiently update the average with each new value.

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Statement

Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. Implement a class called MovingAverage that has the following methods:

  • Constructor (int size): This constructor initializes the object with the specified window size.

  • double next (int val): This method takes an integer value as input and returns the moving average of the last size values from the stream.

Constraints:

  • 1≤1 \leq size ...