How Can I Statically Declare a 2-D Array as a C Class Data Member?

Statically Declaring a 2-D Array as a Class Data Member

In C , a class can contain a 2-D array as a data member. However, dynamic memory allocation is typically used to create these arrays. To avoid this and achieve contiguous memory allocation, one can consider declaring the array statically.

A statically declared 2-D array within a class can be initialized using a custom constructor. Here's an example:

class Grid {
public:
    unsigned NR, NC;
    double Coordinates[NR][NC];

    Grid(unsigned rows, unsigned columns) : NR(rows), NC(columns) {}
};

This class defines a 2-D array Coordinates with dimensions NR and NC. The constructor initializes NR and NC when the object is created.

While it is possible to declare a 2-D array statically in C , it is important to note that the size of the array must be known at compile time. This can be a limitation in some scenarios.

An alternative approach is to use a vector of vectors (std::vector>) to represent a 2-D array. This provides more flexibility as the dimensions can be adjusted dynamically. However, this may result in less efficient memory access compared to a contiguous array.

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