Question

SortAndSearch.cpp – Objectives: Binary Search and Selection sort

You are given a list of 20 names as follows:

{"Collins, Bill", "Smith, Bart", "Michalski, Joe", "Griffin, Jim",

                        "Sanchez, Manny", "Rubin, Sarah", "Taylor, Tyrone", "Johnson, Jill",

                        "Allison, Jeff", "Moreno, Juan", "Wolfe, Bill", "Whitman, Jean",

                        "Moretti, Bella", "Wu, Hong", "Patel, Renee", "Harrison, Rose",

                  "Smith, Cathy", "Conroy, Pat", "Kelly, Sean", "Holland, Beth"};

Write a program to sort and display the names in alphabet order (use selection sort).

The program prompts the user to enter the name being search (use binary search). The program also makes a correction to upper case the first character of the first and last name (see sample output).

Sample output:

The names in sorted order are:

Allison, Jeff

Collins, Bill

Conroy, Pat

Griffin, Jim

Harrison, Rose

Holland, Beth

Johnson, Jill

Kelly, Sean

Michalski, Joe

Moreno, Juan

Moretti, Bella

Patel, Renee

Rubin, Sarah

Sanchez, Manny

Smith, Bart

Smith, Cathy

Taylor, Tyrone

Whitman, Jean

Wolfe, Bill

Wu, Hong

Type the name to search (Last name, first name):

haRRIson, rOSe

Harrison, Rose was found in the array.

Another name search? (Y/N)y

Type the name to search (Last name, first name):

keLlY, kAY

Kelly, Kay was NOT found in the array.

Another name search? (Y/N)y

// Function prototypes

void   displayNames(const string[], int);

       Called by main function; passed the array of names and the number of names. Prints the list of names.

void   selectionSort(string[], int);

       Called by main; passed the array of names and the number of names to sort into alphabetic ascending order.

string upperCaseIt(const string);

       Called by main; passed a string being search. Convert the first character of the first and last name of the string passed in to uppercase only.

bool   binarySearch(const string[], int, string);

       Called by main function; passed the array of strings, the number of strings, and the string being searched for.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include<iostream>

using namespace std;

void displayNames(const string[], int);

void selectionSort(string[], int);

string upperCaseIt(const string);

bool binarySearch(const string[], int, string);

int main(){

              string names[20]={"Collins, Bill", "Smith, Bart", "Michalski, Joe", "Griffin, Jim",

                        "Sanchez, Manny", "Rubin, Sarah", "Taylor, Tyrone", "Johnson, Jill",

                        "Allison, Jeff", "Moreno, Juan", "Wolfe, Bill", "Whitman, Jean",

                        "Moretti, Bella", "Wu, Hong", "Patel, Renee", "Harrison, Rose",

                  "Smith, Cathy", "Conroy, Pat", "Kelly, Sean", "Holland, Beth"};

    //sorting names

    selectionSort(names,20);

    //displaying sorted names

              cout<<"The names in sorted order are: "<<endl;

              displayNames(names,20);

              string name;

              char choice='Y';

              //looping as long as user wishes

              while(choice=='Y'){

                           //getting the name to be searched

                           cout<<"Type a name to search (Lastname, first name): "<<endl;

                           getline(cin,name);

                           //upper casing name (first letters of first and last name)

                           name=upperCaseIt(name);

                           //searching in the array for name

                           if(binarySearch(names,20,name)){

                                         //found

                                         cout<<name<<" was found in the array"<<endl;

                           }else{

                                         //not found

                                         cout<<name<<" was not found in the array"<<endl;

                           }

                           //asking user if he likes to search again

                           cout<<"Another name search: (y/n): ";

                           cin>>choice; //getting choice

                           choice=toupper(choice); //converting to upper case

                           //removing newline character from stdin buffer, or it will be

                           //swallowed by the getline() method in the next loop

                           fflush(stdin);

              }

              return 0;

}

//implementation of method to display names

void displayNames(const string names[], int size){

              for(int i=0;i<size;i++){

                           cout<<names[i]<<endl;

              }

}

//implementation of method to sort names in alphabetical order

void selectionSort(string names[], int size){

              //required variables declaration

              string minValue,temp;

              int minIndex;

              //using selection sort algorithm to sort elements

              for(int i=0;i<size-1;i++)

    {

        minValue=names[i];

        minIndex=i;

        //finding index of smallest value in unsorted part

        for(int j=i+1;j<size;j++)

        {

              if(minValue>names[j])

            {

                minValue=names[j];

                minIndex=j;

            }

        }

                           //swapping elements at indices i and minIndex

        temp=names[i];

        names[i]=names[minIndex];

        names[minIndex]=temp;

    }

}

//implementation of method to capitalize first and last names

string upperCaseIt(const string str){

              string res="";

              bool cap=true; //will capitalize first letter

              for(int i=0;i<str.length();i++){

                           char c=str[i];

                           if(cap && isalpha(c)){

                                         //current character is a letter and cap is true, so

                                         //converting to upper case

                                         c=toupper(c);

                                         cap=false;

                           }else if(c==','){

                                         //comma detected, end of first name, so setting cap to true

                                         //to capitalize first letter of last name

                                         cap=true;

                           }else{

                                         //lower casing character in all other cases

                                         c=tolower(c);

                           }

                           //appending to result string

                           res+=c;

              }

              return res;

}

//implementation of method to binary search for a value

bool binarySearch(const string names[], int size, string search_term){

              //defining required variables, initializing them

              int low=0;

              int high=size-1;

              int mid;

              //looping until low is less than or equal to high

              while(low<=high){

                           //finding mid index

                           mid=(low+high)/2;

                           if(names[mid]==search_term){

                                         //found

                                         return true;

                           }else if(names[mid]<search_term){

                                         //searching in second half

                                         low=mid+1;

                           }else{

                                         //searching in first half

                                         high=mid-1;

                           }

              }

              return false; //not found

}

/*OUTPUT*/

The names in sorted order are:

Allison, Jeff

Collins, Bill

Conroy, Pat

Griffin, Jim

Harrison, Rose

Holland, Beth

Johnson, Jill

Kelly, Sean

Michalski, Joe

Moreno, Juan

Moretti, Bella

Patel, Renee

Rubin, Sarah

Sanchez, Manny

Smith, Bart

Smith, Cathy

Taylor, Tyrone

Whitman, Jean

Wolfe, Bill

Wu, Hong

Type a name to search (Lastname, first name):

wHItMaN, jEAN

Whitman, Jean was found in the array

Another name search: (y/n): y

Type a name to search (Lastname, first name):

TayLOR, sWifT

Taylor, Swift was not found in the array

Another name search: (y/n): y

Type a name to search (Lastname, first name):

JOhnson, Jill

Johnson, Jill was found in the array

Another name search: (y/n): n