5. Building Block View

5.1 Container Diagram

5.2 Component Descriptions

Component	Responsibility
Input Parser	Reads lines from stdin, groups them into Field structs (dimensions + grid rows), stops on 0 0.
Field Processor	For each field, replaces each . cell with the count of adjacent * cells (8-directional).
Output Formatter	Prints Field #N: header followed by the annotated grid; separates fields with a blank line.

5.3 Data Structure

The single shared data structure passed between components:

struct Field {
    int rows, cols;
    vector<string> grid; // rows x cols, cells are '.' or '*'
};

5.4 Component Diagram