How Can I Overload the [] Operator for Accessing Elements in a Two-Dimensional Array in C ?

Overloading the [] Operator for Two-Dimensional Arrays

A two-dimensional array is a collection of elements organized into rows and columns. In C , two-dimensional arrays are typically stored as a pointer to an array of pointers, with each pointer pointing to an array of elements in a row.

Overloading the [] Operator

In C , it is possible to overload the [] operator to access elements of an array. By default, the [] operator takes a single integer index and returns a reference to the corresponding element in the array.

Overloading for Two Dimensions

To allow for accessing elements of a two-dimensional array using two indices, we can overload the [] operator twice. This can be done by creating a nested class that represents a row of the array, and then overloading the [] operator for both the parent class and the nested class.

Example Code

Here is an example implementation of a two-dimensional array class with overloaded [] operators:

class ArrayOfArrays {
public:
    ArrayOfArrays() {
        _arrayofarrays = new int*[10];
        for(int i = 0; i <p>In this example, the ArrayOfArrays class represents the entire two-dimensional array, while the Proxy class represents a row of the array. The [] operator is overloaded in both the ArrayOfArrays and Proxy classes, allowing elements to be accessed using one or two indices, respectively.</p><p><strong>Usage</strong></p><p>To use the ArrayOfArrays class, you can create an instance and access elements using the [] operators:</p><pre class="brush:php;toolbar:false">ArrayOfArrays aoa;
aoa[3][5]; // Accesses the element at row 3, column 5

By overloading the [] operator in this way, we can access elements of a two-dimensional array using a syntax that is similar to accessing elements of a one-dimensional array.

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