Compile and Execute C Online

#include <stdio.h>

void fun(int arr[])
{
int i;
int arr_size = sizeof(arr)/sizeof(arr[0]);
printf("sizeof arr %d",sizeof(arr));
printf("\n size of first element %d",sizeof(arr[0]));
for (i = 0; i < arr_size; i++)
{
printf("%d ", arr[i]);
}
}

int main()
{
int i;
int arr[4] = {10, 20 ,30, 40};
fun(arr);
}