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Write C++ program to find reverse of a number using recursion

YasminRadwan26
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2022-05-08
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Write C++ program to find reverse of a number using recursion

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YasminRadwan26
2022-05-08
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I have used CodeBlocks compiler for debugging purpose. But you can use any C++ programming language compiler as per your availability.

#include <iostream>
#include <math.h>
 
using namespace std;
 
 //Fuction declaration
int reverseNumber(int num);
 
int main()
{
    int num, reverse;
 
    // Inputting number from user
    cout<<"Enter any number: ";
    cin>>num;
 
    // Calling function to reverse any number
    reverse = reverseNumber(num);
 
    cout<<"Reverse of number "<<num <<" is: "<<reverse;
 
    return 0;
}
 
//Recursive function to find reverse of any number
 
int reverseNumber(int num)
{
    // Find total digits in num
    int digit = (int) log10(num);
 
    // Base condition
    if(num == 0)
        return 0;
 
    return ((num%10 * pow(10, digit)) + reverseNumber(num/10));
}

Result:

Enter any number: 123

Reverse of number 123 is: 321

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