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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <string>
  4. #include <cmath>
  5. #include <cassert>
  6. #include <iterator>
  7. #include <algorithm>
  8.  
  9. using namespace std;
  10.  
  11. class LargeInteger {
  12. private:
  13.     static int nextLargeIntegerId;
  14.     int id;
  15.     string digits; // the digits of the LargeInt we are representing
  16.  
  17. public:
  18.     LargeInteger(int value);
  19.     ~LargeInteger();
  20.     string tostring();
  21. };
  22.  
  23. LargeInteger::LargeInteger(int value)
  24. {
  25.     // set this instance id
  26.     id = nextLargeIntegerId++;
  27.  
  28.     // iterate through the digits in value, putting them into our
  29.     // array of digits.
  30.     unsigned char digit;
  31.     while(value) {
  32.         // least significant digit
  33.         digit = value % 10;
  34.         digits += digit;
  35.  
  36.         // integer division to chop of least significant digit
  37.         value = value / 10;
  38.     }
  39. }
  40.  
  41. LargeInteger::~LargeInteger()
  42. {
  43.     cout << " destructor entered, freeing my digits" << endl
  44.          << " id = " << id << endl
  45.          //<< " value=" << tostring() // uncomment this after you implement tostring()
  46.          << endl;
  47. }
  48.  
  49. string LargeInteger::tostring()
  50. {
  51.     string intValue(digits.size(),' ');
  52.  
  53.     transform (digits.rbegin(), digits.rend(), intValue.begin(), [](auto &x){return x+'0'; }) ; 
  54.     return intValue;
  55. }
  56. int LargeInteger::nextLargeIntegerId = 0; 
  57.  
  58. int main() {
  59.     // test constructors, destructors and tostring()
  60.     cout << "Testing Constructors, tostring() and destructor:" << endl;
  61.     cout << "-------------------------------------------------------------" << endl;
  62.     LargeInteger li1(3483);
  63.     cout << "li1 = " << li1.tostring() << endl;
  64.  
  65.     return 0;
  66. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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Testing Constructors, tostring() and destructor:
-------------------------------------------------------------
li1 = 3483
 destructor entered, freeing my digits
 id = 0
https://ideone.com/MuNpPk
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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