Replace all ‘0’ with ‘5’ in an input Integer

PROBLEM :

Given a number your task is to complete the function convertFive which takes an integer n as argument and replaces all zeros in the number n with 5 .Your function should return the converted 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 :
--------------------------------------------------------------------------------

/*you are required to complete this method*/

int convertFive(int n)
{
    int k,r ;
    k=0 ;
   
    while(n!=0)
    {
        r=n%10 ;
        if(r!=0)
            k=k*10+r ;
        else
            k=k*10+5 ;
        n=n/10 ;
    }
   
    while(k!=0)
    {
        r=k%10 ;
        n=n*10+r ;
        k=k/10 ;
    }
    return n ;
}

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