How arrays are passed to functions in C/C++

In this tutorial, we will be discussing a program to understand how arrays are passed to functions.

In the case of C/C++, the arrays are passed to a function in the form of a pointer which provides the address to the very first element of the array.

Example

 Live Demo

#include <stdio.h> //passing array as a pointer void fun(int arr[]){    unsigned int n = sizeof(arr)/sizeof(arr[0]);    printf("\nArray size inside fun() is %d", n); } int main(){    int arr[] = {1, 2, 3, 4, 5, 6, 7, 8};    unsigned int n = sizeof(arr)/sizeof(arr[0]);    printf("Array size inside main() is %d", n);    fun(arr);    return 0; }

Output

Array size inside main() is 8 Array size inside fun() is 2