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
#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