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

Replace all '0' with '5' in an input Integer - GeeksQuiz
Given a integer as a input and replace all the '0' with '5' in the integer.

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.

// 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;

}

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