How to Initialize a Constant Array in a Class Initializer in C ?

Initializing a Constant Array in a Class Initializer in C

In C , initializing a constant array within a class's initializer list requires a slightly different approach than initializing other member variables. Let's explore the case where the constant array is meant to have instance-specific values.

Consider the following class:

<code class="cpp">class a {
public:
    const int b[2];
};</code>

To initialize b with specific values in the constructor initialization list, use the following syntax:

<code class="cpp">a::a() : b{2, 3} {
    // Other initialization stuff
}</code>

This approach relies on C 11's brace-enclosed initializer list syntax, which allows you to initialize a constant array within the class initializer. Here's an example:

<code class="cpp">struct a {
    const int b[2];

    // Constructor
    a() : b{2, 3} {}
};

int main() {
    a a;
}</code>

In this example, each instance of a will have a unique b array with the specified values. Note that this technique is not available in C 98 or earlier versions.

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