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

Given a integer as a input and replace all the ‘0’ with ‘5’ in the integer.
Examples:

    102 - 152
    1020 - 1525

Use of array to store all digits is not allowed.

Source: Amazon interview Experience | Set 136 (For SDE-T)

Recommended: Please solve it on “PRACTICE” first, before moving on to the solution.

The idea is simple, we get the last digit using mod operator ‘%’. If the digit is 0, we replace it with 5, otherwise keep it as it is. Then we recur for remaining digits.

Following is the implementation of the above idea.

C++

// C++ program to replace all ‘0’ 
// with ‘5’ in an input Integer 
#include <bits/stdc++.h> 
using namespace std; 
  
// A recursive function to replace all 0s 
// with 5s in an input number It doesn't  
// work if input number itself is 0. 
int convert0To5Rec(int num) 
{ 
    // Base case for recursion termination 
    if (num == 0) 
        return 0; 
  
    // Extraxt the last digit and  
    // change it if needed 
    int digit = num % 10; 
    if (digit == 0) 
        digit = 5; 
  
    // Convert remaining digits and  
    // append the last digit 
    return convert0To5Rec(num/10) *  
                       10 + digit; 
} 
  
// It handles 0 and calls convert0To5Rec()  
// for other numbers 
int convert0To5(int num) 
{ 
    if (num == 0) 
    return 5; 
    else return convert0To5Rec(num); 
} 
  
// Driver code 
int main() 
{ 
    int num = 10120; 
    cout << convert0To5(num); 
    return 0; 
} 
  
// This code is contributed by Code_Mech.  

C

// C program to replace all ‘0’ with ‘5’ in an input Integer 
#include<stdio.h> 
  
// A recursive function to replace all 0s with 5s in an input number 
// It doesn't work if input number itself is 0. 
int convert0To5Rec(int num) 
{ 
    // Base case for recursion termination 
    if (num == 0) 
        return 0; 
  
    // Extraxt the last digit and change it if needed 
    int digit = num % 10; 
    if (digit == 0) 
        digit = 5; 
  
    // Convert remaining digits and append the last digit 
    return convert0To5Rec(num/10) * 10 + digit; 
} 
  
// It handles 0 and calls convert0To5Rec() for other numbers 
int convert0To5(int num) 
{ 
    if (num == 0) 
       return 5; 
    else return  convert0To5Rec(num); 
} 
  
// Driver program to test above function 
int main() 
{ 
    int num = 10120; 
    printf("%d", convert0To5(num)); 
    return 0; 
}

Java

// Java code for Replace all 0 with 5 in an input Integer 
class GFG { 
      
    // A recursive function to replace all 0s with 5s in  
    // an input number. It doesn't work if input number  
    // itself is 0. 
    static int convert0To5Rec(int num) 
    { 
        // Base case 
        if (num == 0) 
            return 0; 
          
        // Extraxt the last digit and change it if needed 
        int digit = num % 10;  
        if (digit == 0) 
            digit = 5; 
  
        // Convert remaining digits and append the  
        // last digit 
        return convert0To5Rec(num / 10) * 10 + digit; 
    } 
  
    // It handles 0 and calls convert0To5Rec() for 
    // other numbers 
    static int convert0To5(int num) 
    { 
        if (num == 0) 
            return 5; 
        else
            return convert0To5Rec(num); 
    } 
  
    // Driver function 
    public static void main(String[] args) 
    { 
        System.out.println(convert0To5(10120)); 
    } 
} 
  
// This code is contributed by Kamal Rawal 

Python

# Python program to replace all 0 with 5 in given integer 
  
# A recursive function to replace all 0s with 5s in an integer 
# Does'nt work if the given number is 0 itself 
def convert0to5rec(num): 
  
    # Base case for recurssion termination 
    if num == 0: 
        return 0
  
    # Extract the last digit and change it if needed 
    digit = num % 10
  
    if digit == 0: 
        digit = 5
  
    # Convert remaining digits and append the last digit 
    return convert0to5rec(num/10) * 10 + digit 
  
# It handles 0 to 5 calls convert0to5rec() for other numbers 
def convert0to5(num): 
    if num == 0: 
        return 5
    else: 
        return convert0to5rec(num) 
  
  
# Driver Program 
num = 10120
print convert0to5(num) 
  
# Contributed by Harshit Agrawal 

C#

// C# code for Replace all 0  
// with 5 in an input Integer  
using System; 
  
class GFG  
{  
  
// A recursive function to replace  
// all 0s with 5s in an input number. 
// It doesn't work if input number  
// itself is 0.  
static int convert0To5Rec(int num)  
{  
    // Base case  
    if (num == 0)  
        return 0;  
      
    // Extraxt the last digit and 
    // change it if needed  
    int digit = num % 10;  
    if (digit == 0)  
        digit = 5;  
  
    // Convert remaining digits  
    // and append the last digit  
    return convert0To5Rec(num / 10) * 10 + digit;  
}  
  
// It handles 0 and calls  
// convert0To5Rec() for other numbers  
static int convert0To5(int num)  
{  
    if (num == 0)  
        return 5;  
    else
        return convert0To5Rec(num);  
}  
  
// Driver Code  
static public void Main () 
{ 
    Console.Write(convert0To5(10120));  
}  
}  
  
// This code is contributed by Raj 

PHP

<?php 
// PHP program to replace all 0 with 5  
// in given integer 
  
// A recursive function to replace all 0s  
// with 5s in an integer. Does'nt work if  
// the given number is 0 itself 
function convert0to5rec($num) 
{ 
  
    // Base case for recurssion termination 
    if ($num == 0) 
        return 0; 
  
    // Extract the last digit and  
    // change it if needed 
    $digit = ($num % 10); 
  
    if ($digit == 0) 
        $digit = 5; 
  
    // Convert remaining digits and append 
    // the last digit 
    return convert0to5rec((int)($num / 10)) *  
                                10 + $digit; 
} 
  
// It handles 0 to 5 calls convert0to5rec()  
// for other numbers 
function convert0to5($num) 
{ 
    if ($num == 0) 
        return 5; 
    else
        return convert0to5rec($num); 
}  
  
// Driver Code 
$num = 10120; 
print(convert0to5($num)); 
  
// This code is contributed by mits 
?> 

Output:

This article is contributed by Sai Kiran. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

My Personal Notes

Recommended: Please solve it on “PRACTICE” first, before moving on to the solution.

C++

C

Java

Python

C#

PHP

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