Programming Challenges - A List Post: 302120584

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Top Forums Programming Programming Challenges - A List Post 302120584 by matrixmadhan on Thursday 7th of June 2007 06:59:49 AM

06-07-2007

Registered User

Quote:

Originally Posted by blowtorch

Challenge: DRAM

Difficulty: Easy to Medium in C, Easy in perl/python

As the problem says, the value of the palindrome may exceed your system's defined integer size in C/C++.

Here is my shot! Smilie

Code:

#include <stdio.h>

int reverseCheck(unsigned long);

int main()
{
  unsigned long number = 2468;
  unsigned long tmp = 0;

  while ( tmp != number ) {
    tmp = reverseCheck(number);
    if( tmp == number ) {
      tmp = number;
    }
    else {
      number += tmp;
    }
  }

  printf("Number:%d\n", number);

  return 0;
}

int reverseCheck(unsigned long number) {
  unsigned int i;
  unsigned long num;
  unsigned long sum;

  for( num = number, i=1; num / 10; i *= 10, num /= 10 );
  for( sum = 0; number > 0; sum += (number % 10) * i, number /= 10, i /= 10);

  return sum;
}

matrixmadhan

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std::decimal::decimal64

std::decimal::decimal64(3cxx)											     std::decimal::decimal64(3cxx)

NAME

       std::decimal::decimal64 -

SYNOPSIS

   Public Types
       typedef float __decfloat64 __attribute__ ((mode(DD)))

   Public Member Functions
       decimal64 (decimal32 d32)
       decimal64 (decimal128 d128)
       decimal64 (float __r)
       decimal64 (double __r)
       decimal64 (long double __r)
       decimal64 (int __z)
       decimal64 (unsigned int __z)
       decimal64 (long __z)
       decimal64 (unsigned long __z)
       decimal64 (long long __z)
       decimal64 (unsigned long long __z)
       decimal64 (__decfloat64 __z)
       __decfloat64 __getval (void)
       void __setval (__decfloat64 __x)
       decimal64 & operator*= (decimal32 __rhs)
       decimal64 & operator*= (decimal64 __rhs)
       decimal64 & operator*= (decimal128 __rhs)
       decimal64 & operator*= (int __rhs)
       decimal64 & operator*= (unsigned int __rhs)
       decimal64 & operator*= (long __rhs)
       decimal64 & operator*= (unsigned long __rhs)
       decimal64 & operator*= (unsigned long long __rhs)
       decimal64 & operator*= (long long __rhs)
       decimal64 & operator++ ()
       decimal64 operator++ (int)
       decimal64 & operator+= (int __rhs)
       decimal64 & operator+= (decimal32 __rhs)
       decimal64 & operator+= (decimal64 __rhs)
       decimal64 & operator+= (decimal128 __rhs)
       decimal64 & operator+= (unsigned int __rhs)
       decimal64 & operator+= (long __rhs)
       decimal64 & operator+= (unsigned long __rhs)
       decimal64 & operator+= (long long __rhs)
       decimal64 & operator+= (unsigned long long __rhs)
       decimal64 & operator-- ()
       decimal64 operator-- (int)
       decimal64 & operator-= (long __rhs)
       decimal64 & operator-= (int __rhs)
       decimal64 & operator-= (long long __rhs)
       decimal64 & operator-= (unsigned long long __rhs)
       decimal64 & operator-= (unsigned long __rhs)
       decimal64 & operator-= (decimal128 __rhs)
       decimal64 & operator-= (unsigned int __rhs)
       decimal64 & operator-= (decimal32 __rhs)
       decimal64 & operator-= (decimal64 __rhs)
       decimal64 & operator/= (decimal32 __rhs)
       decimal64 & operator/= (long long __rhs)
       decimal64 & operator/= (unsigned long long __rhs)
       decimal64 & operator/= (unsigned long __rhs)
       decimal64 & operator/= (decimal64 __rhs)
       decimal64 & operator/= (unsigned int __rhs)
       decimal64 & operator/= (decimal128 __rhs)
       decimal64 & operator/= (long __rhs)
       decimal64 & operator/= (int __rhs)

Detailed Description
       3.2.3 Class decimal64.

       Definition at line 310 of file decimal.

Constructor &; Destructor Documentation
   std::decimal::decimal64::decimal64 (__decfloat64__z) [inline]
       Conforming extension: Conversion from scalar decimal type.

       Definition at line 334 of file decimal.

Author
       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++							  Tue Nov 27 2012				     std::decimal::decimal64(3cxx)