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Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Jun 6, 2005

Using Recursion Efficiently

It's important to use recursion carefully to avoid running into stack overflow. This sample code reverses a given integer number using recursion:

#include "stdafx.h"

int myreverse(int num)
{
   static int nLocal = 0;
   if(num > 0)
     nLocal = (nLocal* 10) + (num%10) ;
   else
     return nLocal;
   return myreverse(num/10);
}

int main(int argc, char* argv[])
{
   int number = 0;	
   printf("Enter a number: ");
   scanf("%d", &number);
   number = myreverse(number);
   printf("Reverse value: %d\n\n", number);
   return 0;
}
Sudharsan Srinivasan
 
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