#include <iostream>
using namespace std;
void f(int d[],const int sized){ // C++ style, empty [] tells compiler d is array
  // d is passed by reference! 
  // You are dealing with the original array, not with it's copy.
  for (int i=0;i<sized;++i) cout<<i<<" "<<d[i]<<endl;  
}
int main(){
  int j[]={2,4,5}; 
  f(j,3);
  return 0 ;
}