jeudi 5 février 2015

Can anyone please tell me why is it showing "runtime error"?

I'm trying to implement hash table, but I'm getting a runtime error in the for loop of createHashTable() function. Can anyone please tell me why is it showing this "runtime error"? Is it StackOverflow error?



#include <iostream>
using namespace std;

#define LOAD_FACTOR 20

struct ListNode{
int data;
struct ListNode *next;
};

struct HashTableNode{
int bCount; // number of elements in the block
struct ListNode *next;
};

struct HashTable{
int tSize; // table size
int count; // total number of elements in the table
struct HashTableNode **hashTableNodeArray;
};

int hashFunction(struct HashTable *h, int data){
return data % h->tSize;
}

struct HashTable * createHashTable(int numberOfElements){
struct HashTable *h = new HashTable;
h->count = 0;
h->tSize = numberOfElements / LOAD_FACTOR;
h->hashTableNodeArray = new HashTableNode *[h->tSize];
for(int i = 0; i < h->tSize; ++i){
// this is where it is showing runtime error
h->hashTableNodeArray[i]->bCount = 0;
h->hashTableNodeArray[i]->next = nullptr;
}
return h;
}

void deleteHashTable(struct HashTable *h){
struct ListNode *node, *tmp;
for(int i = 0; i < h->tSize; ++i){
node = h->hashTableNodeArray[i]->next;
while(node != nullptr){
tmp = node;
node = node->next;
delete tmp;
}
}
delete[] h->hashTableNodeArray;
delete h;
}

int main(int argc, char **argv){
struct HashTable *h = createHashTable(220);
deleteHashTable(h);
return 0;
}

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