Please allow user to Do the following - search for state - delete state The foll
ID: 3823687 • Letter: P
Question
Please allow user to Do the following - search for state - delete state The following is the file with the state data..Solve the following Problem a) Some of the attributes of a state in the United States are its name, capital, area, year of admission to the union, and the order of admission to the union. Design the class stateData to keep track of the information for a state. Your class must include appropriate functions to manipulate the state's data, such as the functions setstateInfo, getStatelnfo, and so on. Also, overload the relational operators to compare two states by their name. For easy input and output, overload the stream operators. b) Use Hashing to create a hash table to keep track of each state's information. Select and implement a hash function and a collision resolution method that can be used to implement this problem. Use the state's name (as described in class stateData in part a) as the key to determine the hash address. You may assume that a state's name is a string of no more than 15 characters.
Explanation / Answer
//main.cpp
#include <iostream>
#include <cassert>
#include <fstream>
#include "orderedArrayListType.h"
#include "hashT.h"
#include "stateData.h"
using namespace std;
void part2();
int main() {
part2();
};
void part2() {
cout << " ============================|Problem 2|======================================= " << endl;
//create hash
hashT<stateData> stateHash(101);
cout << "Opening file..." << endl;
//opening file
ifstream infile;
infile.open("state_data.txt");
assert(infile.is_open());
cout << "Creating hash from file..." << endl;
//using file as input to supply our hash with states
while (infile){
stateData newState;
infile >> newState;
int stateIndex = stateHash.hashFunc(newState.getName()); //creating index using hash function
stateHash.insert(stateIndex, newState); //add to hash
}
infile.close(); // close file
//Searching for a state
bool found1;
int hashIndex;
string stateName;
stateData searchState;
cout << "Search the hash, Type the name of a state: ";
cin >> stateName;
hashIndex = stateHash.hashFunc(stateName);
searchState = stateData(stateName);
stateHash.search(hashIndex, searchState, found1);
if (found1 && stateHash.isItemAtEqual(hashIndex, searchState))
{
cout << "Success!" << endl;
stateHash.retrieve(hashIndex, searchState);
cout << searchState << endl;
}
else {
cout << "Not Found!" << endl;
}
cout << "REMOVING STATE" << endl;
stateHash.remove(hashIndex, searchState);
bool found2;
stateHash.search(hashIndex, searchState, found2);
if (found2 && stateHash.isItemAtEqual(hashIndex,searchState))
{
cout << "Failed to remove state." << endl;
cout << searchState << endl;
}
else {
cout << "Successfully removed state." << endl;
cout << "Printing States" << endl;
cout << setw(15) << left << "Name: " << " | ";
cout << setw(15) << left << "Capital: " << " | ";
cout << setw(15) << left << "Joined Union: " << " | ";
cout << setw(15) << left << "Join Number: " << " | ";
cout << setw(15) << left << "Area: " << endl;
stateHash.print();
}
}
============================================================================
//orderedArrayListType.h
#ifndef H_OrderedListType
#define H_OrderedListType
#include <iostream>
#include "arrayListType.h"
using namespace std;
template<class elemType>
class orderedArrayListType: public arrayListType<elemType>
{
public:
void insertOrd(const elemType&);
void fill();
int binarySearch(const elemType& item) const;
int binaryWithSeqSearch(const elemType& item)const;
orderedArrayListType(int size = 100);
};
template <class elemType>
void orderedArrayListType<elemType>::insertOrd(const elemType& item)
{
int first = 0;
int last = length - 1;
int mid;
bool found = false;
if (length == 0) //the list is empty
{
list[0] = item;
length++;
}
else if (length == maxSize)
cerr << "Cannot insert into a full list." << endl;
else
{
while (first <= last && !found)
{
mid = (first + last) / 2;
if (list[mid] == item)
found = true;
else if (list[mid] > item)
last = mid - 1;
else
first = mid + 1;
}//end while
if (found)
cerr << "The insert item is already in the list. "
<< "Duplicates are not allowed." << endl;
else
{
if (list[mid] < item)
mid++;
insertAt(mid, item);
}
}
}//end insertOrd
template<class elemType>
int orderedArrayListType<elemType>::binaryWithSeqSearch
(const elemType& item) const
{
int first = 0;
int last = length - 1;
int mid;
bool found = false;
int count = 0;
while (first <= last && !found)
{
mid = (first + last) / 2;
count++;
if (list[mid] == item)
found = true;
else if (list[mid] > item)
last = mid - 1;
else
first = mid + 1;
//once the partition has reached 15 or below
if (last - first <= 15) {
for (int i = first; i <= last; i++) {
count++;
if (list[i] == item) {
found = true;
break;
}
}
break;
}
}
cout << "Binary search with sequential comparisons: " << count << endl;
if (found)
return mid;
else
return -1;
}//end binaryWithSeqSearch
template<class elemType>
int orderedArrayListType<elemType>::binarySearch
(const elemType& item) const
{
int first = 0;
int last = length - 1;
int mid;
bool found = false;
int count = 0;
count = 2;
while (first <= last && !found)
{
mid = (first + last) / 2;
count++;
if (list[mid] == item)
found = true;
else if (list[mid] > item)
last = mid - 1;
else
first = mid + 1;
}
cout << "Binary search comparisons: " << count << endl;
if (found)
return mid;
else
return -1;
}//end binarySearch
template<class elemType>
orderedArrayListType<elemType>::orderedArrayListType(int size)
: arrayListType<elemType>(size)
{
}
template<class elemType>
void orderedArrayListType<elemType> :: fill()
{
int seed = 47;
int multiplier = 2743;
int addOn = 5923;
while (listSize() < maxListSize())
{
insertOrd(seed);
seed = int((seed * multiplier + addOn) % 100000);
}
}
#endif
================================================================================
//arrayListType.h
#ifndef H_arrayListType
#define H_arrayListType
#include <iostream>
#include <cassert>
using namespace std;
template <class elemType>
class arrayListType
{
public:
const arrayListType<elemType>& operator=
(const arrayListType<elemType>&);
//Overloads the assignment operator
bool isEmpty() const;
//Function to determine whether the list is empty
//Postcondition: Returns true if the list is empty;
// otherwise, returns false.
bool isFull() const;
//Function to determine whether the list is full.
//Postcondition: Returns true if the list is full;
// otherwise, returns false.
int listSize() const;
//Function to determine the number of elements in the list
//Postcondition: Returns the value of length.
int maxListSize() const;
void print() const;
bool isItemAtEqual(int location, const elemType& item) const;
void insertAt(int location, const elemType& insertItem);
void insertEnd(const elemType& insertItem);
void removeAt(int location);
void retrieveAt(int location, elemType& retItem) const;
void replaceAt(int location, const elemType& repItem);
void clearList();
int seqSearch(const elemType& item) const;
void insert(const elemType& insertItem);
//Function to insert the item specified by the parameter
//insertItem at the end of the list. However, first the
//list is searched to see whether the item to be inserted
//is already in the list.
//Postcondition: list[length] = insertItem and length++
// If the item is already in the list or the list
// is full, an appropriate message is displayed.
void remove(const elemType& removeItem);
//Function to remove an item from the list. The parameter
//removeItem specifies the item to be removed.
//Postcondition: If removeItem is found in the list,
// it is removed from the list and length is
// decremented by one.
arrayListType(int size = 100);
//constructor
//Creates an array of the size specified by the
//parameter size. The default array size is 100.
//Postcondition: The list points to the array, length = 0,
// and maxSize = size
arrayListType(const arrayListType<elemType>& otherList);
//copy constructor
~arrayListType();
//destructor
//Deallocates the memory occupied by the array.
protected:
elemType *list; //array to hold the list elements
int length; //to store the length of the list
int maxSize; //to store the maximum size of the list
};
template <class elemType>
bool arrayListType<elemType>::isEmpty() const
{
return (length == 0);
}
template <class elemType>
bool arrayListType<elemType>::isFull() const
{
return (length == maxSize);
}
template <class elemType>
int arrayListType<elemType>::listSize() const
{
return length;
}
template <class elemType>
int arrayListType<elemType>::maxListSize() const
{
return maxSize;
}
template <class elemType>
void arrayListType<elemType>::print() const
{
for (int i = 0; i < length; i++)
cout << list[i] << " ";
cout << endl;
}
template <class elemType>
bool arrayListType<elemType>::isItemAtEqual
(int location, const elemType& item) const
{
return(list[location] == item);
}
template <class elemType>
void arrayListType<elemType>::insertAt
(int location, const elemType& insertItem)
{
if (location < 0 || location >= maxSize)
cerr << "The position of the item to be inserted "
<< "is out of range" << endl;
else if (length >= maxSize) //list is full
cerr << "Cannot insert in a full list" << endl;
else
{
for (int i = length; i > location; i--)
list[i] = list[i - 1]; //move the elements down
list[location] = insertItem; //insert the item at the
//specified position
length++; //increment the length
}
} //end insertAt
template <class elemType>
void arrayListType<elemType>::insertEnd(const elemType& insertItem)
{
if (length >= maxSize) //the list is full
cerr << "Cannot insert in a full list" << endl;
else
{
list[length] = insertItem; //insert the item at the end
length++; //increment the length
}
} //end insertEnd
template <class elemType>
void arrayListType<elemType>::removeAt(int location)
{
if (location < 0 || location >= length)
cerr << "The location of the item to be removed "
<< "is out of range" << endl;
else
{
for (int i = location; i < length - 1; i++)
list[i] = list[i+1];
length--;
}
} //end removeAt
template <class elemType>
void arrayListType<elemType>::retrieveAt
(int location, elemType& retItem) const
{
if (location < 0 || location >= length)
cerr << "The location of the item to be retrieved is "
<< "out of range." << endl;
else
retItem = list[location];
} //end retrieveAt
template <class elemType>
void arrayListType<elemType>::replaceAt
(int location, const elemType& repItem)
{
if (location < 0 || location >= length)
cerr << "The location of the item to be replaced is "
<< "out of range." << endl;
else
list[location] = repItem;
} //end replaceAt
template <class elemType>
void arrayListType<elemType>::clearList()
{
length = 0;
} //end clearList
template <class elemType>
int arrayListType<elemType>::seqSearch(const elemType& item) const
{
int loc;
bool found = false;
int count = 0;
for (loc = 0; loc < length; loc++) {
count++;
if (list[loc] == item)
{
found = true;
break;
}
}
cout << "Sequential search comparisons" << count << endl;
if (found)
return loc;
else
return -1;
} //end seqSearch
template <class elemType>
void arrayListType<elemType>::insert(const elemType& insertItem)
{
int loc;
if (length == 0) //list is empty
list[length++] = insertItem; //insert the item and
//increment the length
else if (length == maxSize)
cerr << "Cannot insert in a full list." << endl;
else
{
loc = seqSearch(insertItem);
if (loc == -1) //the item to be inserted
//does not exist in the list
list[length++] = insertItem;
else
cerr << "the item to be inserted is already in "
<< "the list. No duplicates are allowed." << endl;
}
} //end insert
template<class elemType>
void arrayListType<elemType>::remove(const elemType& removeItem)
{
int loc;
if (length == 0)
cerr << "Cannot delete from an empty list." << endl;
else
{
loc = seqSearch(removeItem);
if (loc != -1)
removeAt(loc);
else
cout << "The item to be deleted is not in the list."
<< endl;
}
} //end remove
template <class elemType>
arrayListType<elemType>::arrayListType(int size)
{
if (size < 0)
{
cerr << "The array size must be positive. Creating "
<< "an array of size 100. " << endl;
maxSize = 100;
}
else
maxSize = size;
length = 0;
list = new elemType[maxSize];
assert(list != NULL);
}
template <class elemType>
arrayListType<elemType>::~arrayListType()
{
delete [] list;
}
template <class elemType>
arrayListType<elemType>::arrayListType
(const arrayListType<elemType>& otherList)
{
maxSize = otherList.maxSize;
length = otherList.length;
list = new elemType[maxSize]; //create the array
assert(list != NULL); //terminate if unable to allocate
//memory space
for (int j = 0; j < length; j++) //copy otherList
list [j] = otherList.list[j];
} //end copy constructor
template <class elemType>
const arrayListType<elemType>& arrayListType<elemType>::operator=
(const arrayListType<elemType>& otherList)
{
if (this != &otherList) //avoid self-assignment
{
delete [] list;
maxSize = otherList.maxSize;
length = otherList.length;
list = new elemType[maxSize]; //create the array
assert(list != NULL); //if unable to allocate memory
//space, terminate the program
for (int i = 0; i < length; i++)
list[i] = otherList.list[i];
}
return *this;
}
#endif
==============================================================================
//hashT.h
#ifndef H_Htable
#define H_Htable
#include <iostream>
#include <cassert>
using namespace std;
template <class elemType>
class hashT
{
public:
void insert(int hashIndex, const elemType& rec);
//Function to insert an item in the hash table. The first
//parameter specifies the initial hash index of the item to
//be inserted. The item to be inserted is specified by the
//parameter rec.
//Postcondition: If an empty position is found in the hash
// table, rec is inserted and the length is incremented by
// one; otherwise, an appropriate error message is
// displayed.
void search(int& hashIndex, const elemType& rec, bool& found) const;
//Function to determine whether the item specified by the
//parameter rec is in the hash table. The parameter hashIndex
//specifies the initial hash index of rec.
//Postcondition: If rec is found, found is set to true and
// hashIndex specifies the position where rec is found;
// otherwise, found is set to false.
bool isItemAtEqual(int hashIndex, const elemType& rec) const;
//Function to determine whether the item specified by the
//parameter rec is the same as the item in the hash table
//at position hashIndex.
//Postcondition: Returns true if HTable[hashIndex] == rec;
// otherwise, returns false.
void retrieve(int hashIndex, elemType& rec) const;
//Function to retrieve the item at position hashIndex.
//Postcondition: If the table has an item at position
// hashIndex, it is copied into rec.
void remove(int hashIndex, const elemType& rec);
//Function to remove an item from the hash table.
//Postcondition: Given the initial hashIndex, if rec is found
// in the table it is removed; otherwise, an appropriate
// error message is displayed.
void print() const;
//Function to output the data.
int hashFunc(string name);
//hash function for hashing algorithm
hashT(int size = 101);
//constructor
//Postcondition: Create the arrays HTTable and indexStatusList;
// initialize the array indexStatusList to 0; length = 0;
// HTSize = size; and the default array size is 101.
~hashT();
//destructor
//Postcondition: Array HTable and indexStatusList are deleted.
private:
elemType *HTable; //pointer to the hash table
int *indexStatusList; //pointer to the array indicating the
//status of a position in the hash table
int length; //number of items in the hash table
int HTSize; //maximum size of the hash table
};
template <class elemType>
int hashT<elemType>::hashFunc(string name)
{
int i, sum;
int len;
i = 0;
sum = 0;
len = name.length();
for (int k = 0; k < 15 - len; k++)
name = name + ' '; //increase the length of name to 15 characters
for (int k = 0; k < 5; k++)
{
sum = sum + static_cast<int>(name[i]) * 128 * 128
+ static_cast<int>(name[i + 1]) * 128
+ static_cast<int>(name[i + 2]);
i = i + 3;
}
return sum % HTSize;
}
template <class elemType>
void hashT<elemType>::insert(int hashIndex, const elemType& rec)
{
int pCount;
int inc;
pCount = 0;
inc = 1;
while(indexStatusList[hashIndex] == 1
&& HTable[hashIndex] != rec
&& pCount < HTSize / 2)
{
pCount++;
hashIndex = (hashIndex + inc ) % HTSize;
inc = inc + 2;
}
if(indexStatusList[hashIndex] != 1)
{
HTable[hashIndex] = rec;
indexStatusList[hashIndex] = 1;
length++;
}
else
if(HTable[hashIndex] == rec)
cerr<<"Error: No duplicates are allowed."<<endl;
else
cerr<<"Error: The table is full. "
<<"Unable to resolve the collision."<<endl;
}
template <class elemType>
void hashT<elemType>::search(int& hashIndex, const elemType& rec, bool& found) const
{
int pCount;
int inc;
pCount = 0;
inc = 1;
while (indexStatusList[hashIndex] != 0
&& HTable[hashIndex] != rec
&& pCount < HTSize / 2)
{
pCount++;
hashIndex = (hashIndex + inc) % HTSize;
inc = inc + 2;
}
if (HTable[hashIndex] == rec && indexStatusList[hashIndex] == 1) {
found == true;
}
else {
found == false;
}
}
template <class elemType>
bool hashT<elemType>::isItemAtEqual(int hashIndex, const elemType& rec) const
{
if (indexStatusList[hashIndex] != 1) {
cout << "No Item at location!" << endl;
return false;
}
else {
return HTable[hashIndex] == rec;
}
}
template <class elemType>
void hashT<elemType>::retrieve(int hashIndex, elemType& rec) const
{
if (indexStatusList[hashIndex] != 1) {
cout << "No Item at location!" << endl;
}
else {
rec = HTable[hashIndex];
}
}
template <class elemType>
void hashT<elemType>::remove(int hashIndex, const elemType& rec)
{
bool found;
search(hashIndex, rec, found);
if (found) {
indexStatusList[hashIndex] = -1;
length--;
}
else {
cout << "Item is missing." << endl;
}
}
template <class elemType>
void hashT<elemType>::print() const
{
for (int i = 0; i < HTSize; i++) {
if (indexStatusList[i] == 1) {
cout << HTable[i] << endl;
}
}
}
template <class elemType>
hashT<elemType>::hashT(int size)
{
HTable = new elemType[size];
indexStatusList = new int[size];
HTSize = size;
length = 0;
for (int i = 0; i < size; i++) {
indexStatusList[i] = 0;
}
}
template <class elemType>
hashT<elemType>::~hashT()
{
delete[] HTable;
delete[] indexStatusList;
}
#endif
=========================================================================
//stateData.h
#include <string>
#include <iostream>
#include <iomanip>
using namespace std;
class stateData {
private:
string name;
string capital;
int unionNum;
int year;
int area;
public:
//accessor
string getName() { return name; }
void setName(string n) { name = n; }
string getCapital() { return capital; }
void setCapital(string c) { capital = c; }
int getUnionNum() { return unionNum; }
void setUnionNum(int n) { unionNum = n; }
int getYear() { return year; }
void setYear(int y) { year = y; }
int getArea() { return area; }
void setArea(int a) { area = a; }
stateData(string iname = " ", string icap = " ", int inum = 0, int iyear = 0, int iarea = 0) {
name = iname;
capital = icap;
unionNum = inum;
year = iyear;
area = iarea;
} // constructor
//output overload
friend ostream& operator<<(ostream& out, stateData& state) {
if (state.getArea() > 0) {
out << setw(15) << right << state.getName() << " | ";
out << setw(15) << right << state.getCapital() << " | ";
out << setw(15) << right << state.getYear() << " | ";
out << setw(15) << right << state.getUnionNum() << " | ";
out << setw(15) << right << state.getArea();
}
return out;
}
//input overload
friend istream& operator>>(istream& in, stateData& state) {
char ch;
getline(in, state.name);
getline(in, state.capital);
in >> state.area >> state.year >> state.unionNum;
in.get(ch);
return in;
}
//overload assignment operator
stateData& operator=(const stateData& other) {
name = other.name;
capital = other.capital;
unionNum = other.unionNum;
year = other.year;
area = other.area;
return *this;
}
//overload boolean operators
bool operator==(const stateData& other) const { return name == other.name; }
bool operator!=(const stateData& other) const { return name != other.name; }
bool operator>=(const stateData& other) const { return name >= other.name; }
bool operator>(const stateData& other) const { return name > other.name; }
bool operator<=(const stateData& other) const { return name <= other.name; }
bool operator<(const stateData& other) const { return name < other.name; }
};
=======================================================================
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