Replace all ‘0’ with ‘5’ in an input Integer (Function Problem)

PROBLEM :

Given a number your task is to complete the function convertFive which replace all zeros in the number with 5 and returns the number.

Input:
The first line of input contains an integer T denoting the number of test cases . Then T test cases follow . Each test case contains a single integer N denoting the number.

Output:
The output of the function will be an integer where all zero's are converted to 5 .

Constraints:
1<=T<100
1<=N<=10000

Example:
Input
2
1004
121

Ouput
1554
121

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SIMPLE c++ IMPLEMENTATION :
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/*
Please note that it's Function problem i.e.
you need to write your solution in the form of Function(s) only.
Driver Code to call/invoke your function would be added by GfG's Online Judge.*/


/*you are required to complete this method*/

int convertFive(int n)
{
    if(!n) return 0 ;
    int curr=n%10 ;
    n/=10 ;
    if(!curr) curr=5 ;
    return convertFive(n)*10+curr ;
}

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