How do I return arrays from functions in C?

How do I return arrays from functions in C?

In C, you cannot return an array directly from a function. However, you can return a pointer to the first element of the array.

Can you show me an example of that?

Sure! Here's a simple example:

#include <stdio.h>

int* createArray(int size) {
    int *arr = malloc(size * sizeof(int));
    for (int i = 0; i < size; i++) {
        arr[i] = i + 1;
    }
    return arr;
}

int main() {
    int *myArray = createArray(5);
    for (int i = 0; i < 5; i++) {
        printf("%d ", myArray[i]);
    }
    free(myArray);
    return 0;
}

This function allocates an array dynamically and returns a pointer to it.

What should I do to avoid memory leaks?

Always remember to free the memory allocated with malloc after you're done using the array, as shown in the example.

Are there any alternatives to using pointers for returning arrays?

Yes, you can use static arrays or structures to return arrays, but they have their own limitations. Would you like to know more?