function in c taking array as formal parameter code example

Example 1: array value from user c

#include <stdio.h>
int main(void)
{
int size, i;
printf("Enter the size of the arrays:\n");
scanf("%d", &size);

int arr1[size];
printf("Enter the elements of the array:\n");
for (i = 0; i < size; i++) {
    scanf_s("%d", arr1[size]);
}
printf("The current array is:\n %d", arr1[i]);
}

Example 2: how to accept an array as function parameter in c

#include <stdio.h>
void displayNumbers(int num[2][2]);
int main()
{
    int num[2][2];
    printf("Enter 4 numbers:\n");
    for (int i = 0; i < 2; ++i)
        for (int j = 0; j < 2; ++j)
            scanf("%d", &num[i][j]);

    // passing multi-dimensional array to a function
    displayNumbers(num);
    return 0;
}

void displayNumbers(int num[2][2])
{
    printf("Displaying:\n");
    for (int i = 0; i < 2; ++i) {
        for (int j = 0; j < 2; ++j) {
           printf("%d\n", num[i][j]);
        }
    }
}