C++ arrays and array parameter - BUG!

Question

This code has a bug! (Bugs on lines 4 and 21 according to online compiler C++ shell).

Purpose of this program: I am trying to cin inside an array and pass in that array to another function to do some multiplication and then print out the values. . Please take a look at this code.

#include <iostream>
using namespace std;

void tripler (int n[]){

for (int i = 0; i < 3; i++){
n[i] = n[i] * i;
cout << n[i];
}
}

int main (){

int a[3];
for (int i = 0; i < 3; i++){

cin >> a[i];
int size = 0;
size += i;
tripler (a[size]);
}
return 0;
}

c++ shell link:
cpp.sh/96ohq7

Answer 1

#include <iostream>
using namespace std;

void tripler (int n[]){
for (int j = 1; j <= 3; j++){
for (int i = 0; i < 3; i++){
n[i] *= j;
cout << n[i]<<",";
}

cout<<endl;
}
}

int main (){

int a[3];
for (int i = 0; i < 3; i++){

cin >> a[i];

}
tripler (a);
return 0;
}

Answer 2

Nice one my friend! :)