C++ Program to find the second largest digit of a number

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In this program, You will learn how to find second largest digit of a number in C++.

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Number is : 1234 = 3

Example: How to find the second largest digit of a number in C++.

#include<iostream>
using namespace std;

int main() {

   int n, num, rev=0;
   int r, lar = 0, sl = 0;

   cout << "Enter a number:";
   cin>>n;

   while (n > 0) {
       r = n % 10;
       if (lar < r) {
           lar = r;
       }
       rev = rev * 10 + r;
       n = n / 10;
   }

   n = rev;
   while (n > 0) {
       r = n % 10;
       if (lar != r) {
           if (sl < r) {
               sl = r;
           }
       }
       n = n / 10;
   }
   cout << "Second largest digit:" << sl;

   return 0;
}

Output:

Enter a number:3241
Second largest digit:3