Question

Write a C++ program that creates a map containing course numbers and the room numbers of the rooms where the courses meet. The dictionary should have the following key-value pairs:
Course Number (key) Room Number (value)
CS101 3004
CS102 4501

The program should also create a map containing course numbers and the names of the instructors that teach each course. The map should have the following key-value pairs:

Course Number (key) Instructor (value)
CS101 Haynes
CS102 Alvarado

The program should also create a map containing course numbers and the meeting times of each course. The map should have the following key-value pairs:

Course Number (key) Meeting Time (value)
CS101 8:00am
CS102 9:00am

The program should let the user enter a course number, and then it should display the course's room number, instructor, and meeting time.

Answer 1

Answer:

Program approach:-

• Using the necessary header file.
• Using the standard namespace I/O.
• Define the integer main function.
• Mapping course numbers and room numbers.

Explanation:

//header file

#include<iostream>

#include<map>

//using namespace

using namespace std;

//main function

int main(){

               //creating 3 required maps

               map <string,int> rooms;

               map <string,string> instructors;

               map <string,string> times;

               //mapping course numbers and room numbers

               rooms.insert(pair<string,int>("CS101",3004));

               rooms.insert(pair<string,int>("CS102",4501));

               //mapping course numbers and instructor names

               instructors.insert(pair<string,string>("CS101","Haynes"));

               instructors.insert(pair<string,string>("CS102","Alvarado"));

               //mapping course numbers and meeting times

               times.insert(pair<string,string>("CS101","8:00am"));

               times.insert(pair<string,string>("CS102","9:00am"));

               

               char choice='y';

               //looping until user wishes to quit

               while(choice=='y' || choice=='Y'){

                               cout<<"Enter a course number: ";

                               string course;

                               cin>>course;//getting course number

                               //searching in maps for the required course number will return

                               //an iterator

                               map<string, int>::iterator it1=rooms.find(course);

                               map<string, string>::iterator it2=instructors.find(course);

                               map<string, string>::iterator it3=times.find(course);

               

                               if(it1!=rooms.end()){

                                               //found

                                               cout<<"Room: "<<it1->second<<endl;

                               }else{

                                               //not found

                                               cout<<"Not found"<<endl;

                               }

               

                               if(it2!=instructors.end()){

                                               cout<<"Instructor: "<<it2->second<<endl;

                               }

               

                               if(it3!=times.end()){

                                               cout<<"Meeting Time: "<<it3->second<<endl;

                               }

                               //prompting again

                               cout<<"\nDo you want to search again? (y/n): ";

                               cin>>choice;

               }