[C] Pass a pointer to a 2D array as a function argument

What want to do

• There is an operation that operates on two-dimensional arrays

• There are multiple targets to be processed

In this case, I want to make this process into a function, but I'm not sure how to define the arguments.

Solution

Suppose the array size is fixed, you can do it like this:

// Define a typedef for the array type
typedef int myArray[2][3];

// Function to operate on a 2x3 array
void f(myArray arr) {
    ...
}

Use it like this:

int main() {
    myArray x = {{1, 2, 3}, {4, 5, 6}}; // Define array x
    myArray y = {{7, 8, 9}, {10, 11, 12}}; // Define array y

    // Pass array x to function f
    f(x);

    // Pass array y to function f
    f(y);