Multiply Array

PROBLEM :

Calculate the product of all the elements in an array.

Input:
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consist of two lines . The first line of each test case contains an integer N.The second line of each test case contains N space separated integers denoting elements of the array A[ ].

Output:
For each test case in a new line print the product of all elements.

Constraints:
1 = T = 50
1 = N = 10
1 = A[i] = 5

Example:
Input:
2
5
1 2 3 4 5
10
5 5 5 5 5 5 5 5 5 5

Output:
120
9765625

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SIMPLE c++ IMPLEMENTATION :
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#include<iostream>
using namespace std;
long long product(int [],int ) ;
int main()
 {
int t,no,arr[10],i ;
cin>>t ;
while(t--)
{
   cin>>no ;
   for(i=0;i<no;i++)
       cin>>arr[i] ;
     
   cout<<product(arr,no)<<endl ;
}
return 0;
}

long long product(int arr[],int no)
{
    long long prod=1 ;
    int i ;
 
    for(i=0;i<no;i++)
        prod=prod*arr[i] ;
     
    return prod ;
}

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