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  1. #include <iostream>
  2. #include <stdlib.h>
  3.  
  4. struct customer {
  5. 	void random_customer() {}
  6. };
  7.  
  8. class Node
  9. {
  10.     private:
  11.         customer data;
  12.         Node *next;
  13.     public:
  14.         /*Nodes constructors*/
  15.         Node(){next=nullptr;}
  16.         Node(customer X)
  17.         {
  18.             data=X;
  19.             next=nullptr;
  20.         }
  21.         /*Data setters and getters*/
  22.         void set_Data(customer X)
  23.         {data = X;}
  24.         customer get_Data()
  25.         {return data;}
  26.         /*next setters and getters*/
  27.         void set_next(Node * X){next=X;}
  28.         Node* get_next(){return next;}
  29.  
  30.  
  31. };
  32.  
  33. class List
  34. {
  35.     private:
  36.         Node * head;
  37.         Node * tail;
  38.         int counter;
  39.     public:
  40.         /*Constructors*/
  41.         List(){head=nullptr;tail=head;counter=0;}
  42.         /*Checks if the list is empty*/
  43.         bool isEmpty()
  44.         {
  45.             if (head==nullptr)
  46.                 return true;
  47.             return false;
  48.         }
  49.         /*front manipulation*/
  50.         void add_Front(customer item)
  51.         {
  52.             if (isEmpty())
  53.             {
  54.                 head = new Node(item);
  55.                 tail = head;
  56.                 counter++;
  57.             }
  58.             else{
  59.             Node * nw= new Node(item);
  60.             nw ->set_next(head);
  61.             head=nw;
  62.             counter++;
  63.             }
  64.         }
  65.         void pop_Front()
  66.         {
  67.             if (isEmpty())
  68.                 return;
  69.             if (head==tail)
  70.             {
  71.                 delete head;
  72.                 delete tail;
  73.                 counter--;
  74.                 return;
  75.             }
  76.             Node * temphead=head;
  77.             head=head->get_next();
  78.             delete temphead;
  79.             counter--;
  80.         }
  81.         /*End Manipulation*/
  82.         void add_End(customer X)
  83.         {
  84.             if(isEmpty()){
  85.                 add_Front(X);
  86.                 counter++;}
  87.             else
  88.             {
  89.                 Node * temp=new Node(X);
  90.                 tail->set_next(temp);
  91.                 tail=temp;
  92.                 counter++;
  93.             }
  94.         }
  95.  
  96.         /*freeing the whole list*/
  97.         void Clear()
  98.         {
  99.             while (!isEmpty())
  100.                 pop_Front();
  101.         }
  102.  
  103.         /*Destructor*/
  104.         ~List(){Clear();}
  105.  
  106.         /*Extras*/
  107.         int get_Size(){return counter;}
  108.         customer get_Front(){return head->get_Data();}
  109.         customer get_End(){return tail->get_Data();}
  110.  
  111. };
  112.  
  113. using namespace std;
  114.  
  115. int main()
  116. {
  117.     List Data;
  118.     int numberofelements;
  119.     cout<<"How many customers you wanna randomly generate? : ";
  120.     cin >> numberofelements;
  121.     srand(time(NULL));
  122.     for (int i=0; i<numberofelements; i++)
  123.     {
  124.         customer temp;
  125.         temp.random_customer();
  126.         Data.add_Front(temp);
  127.  
  128.     }
  129.     std::cout << "here goes the destructor\n";
  130.     return 0;
  131. }
  132.  
  133.  
Runtime error #stdin #stdout #stderr 0s 3420KB
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stdin
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3
stdout
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How many customers you wanna randomly generate? : here goes the destructor
stderr
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*** Error in `./prog': double free or corruption (fasttop): 0x08386a10 ***
https://ideone.com/afg7se
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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