Question

Please solve using c++ plus

There are two text files with the following information stored in them:
The instructor.txt file where each line stores the id, name and affiliated department of an instructor separated by a comma
The department.txt file where each line stores the name, location and budget of the department separated by a comma

You need to write a C++ program that reads these text files and provides user with the following menu:
1. Enter the instructor ID and I will provide you with the name of the instructor, affiliated department and the location of that department.
2. Enter the department name and I will provide you with the location, budget and names of all instructors that work for the department.
3. Insert a record about a new instructor.
4. Exit

The above menu should continue to be displayed in a loop until the user selects option 4.

When the user selects option 1 above, the following should be displayed:
Enter the instructor ID:
If the user enters an instructor id that is not present in the text file, display "The ID doesnot appear in the database.", otherwise, display the name of the instructor, affiliated department and the location of that department.

When the user selects option 2 above, the following should be displayed:
Enter the department name:
If the user enters a name that is not present in the text file, display "The department name doesnot appear in the database.", otherwise, display the location, budget and names of all instructors that work for the department.

If the user selects option 3 above, display the following:
Enter the instructor id:
Enter the instructor name:
Enter the affiliated department name:
Once the user enters the above information, store the information in the instructor file

Use vectors instead of arrays whereever needed.

The program should work for any number of rows in the two text files.

Answer 1

PROGRAM:

#include<iostream>

#include<fstream>

#include<string>

#include<vector>

#include <sstream>

using namespace std;

//structure that holds the info of instructor and department

struct instructor

{

int id;

string name,dept;

};

struct department

{

string name,location;

double budget;

};

bool isId(vector<instructor>,int);//bool function that returns true instructor id is in database otherwise false

bool isDept(vector<department>,string);//bool function that returns true department name is in database otherwise false

int menu();//menu function that displays the menu and return user choice

int main()

{

ifstream inInstructor,inDepartment;

string iname,idept,line;

int iId;

vector<instructor>Vins;

vector<department>Vdept;

instructor in;

department dep;

ofstream outInstructor;

bool cont=true;

inInstructor.open("instructor.txt");//opnes the instructor.txt file for reading

if(!inInstructor.is_open())//checks file is opend or not

{

cout<<"department.txt file not found! Exiting....."<<endl;

return 0;

}

inDepartment.open("department.txt");//opnes the department.txt file for reading

if(!inDepartment.is_open())

{

cout<<"instructor.txt file not found! Exiting....."<<endl;

return 0;

}//if both the files are opened for reading then read the files in structure and add the structure in vector

while(getline(inInstructor,line))

{

istringstream ss(line);

int i=0;

while (ss)

{

string s;

if (!getline( ss, s, ',' )) break;

if(i==0)

{

in.id=stoi(s);

}

if(i==1)

{

in.name=s;

}

if(i==2)

{

in.dept=s;

}

i++;

}

Vins.push_back(in);

}

while(getline(inDepartment,line))

{

istringstream ss(line);

int i=0;

while (ss)

{

string s;

if (!getline( ss, s, ',' )) break;

if(i==0)

{

dep.name=s;

}

if(i==1)

{

dep.location=s;

}

if(i==2)

{

dep.budget=stod(s);

}

i++;

}

Vdept.push_back(dep);

}

while(cont)

{

int choice=menu();//calling the menu function

switch (choice)//switch case for user input

{

case 1:

cout<<"\nEnter the instructor id:";

cin>>iId;

if(!isId(Vins,iId))

{

cout<<"\n\nThe ID doesnot appear in the database."<<endl<<endl;

break;

}

for(int i=0;i<Vins.size();i++)

{

if(Vins[i].id==iId)

{

idept=Vins[i].dept;

cout<<"\n\nName : "<<Vins[i].name<<endl<<"Department : "<<Vins[i].dept<<endl;

break;

}

}

for(int i=0;i<Vdept.size();i++)

{

if(Vdept[i].name==idept)

{

cout<<"Location : "<<Vdept[i].location<<endl;

}

}

break;

case 2:

cout<<"\nEnter the Department Name :";

cin>>idept;

if(!isDept(Vdept,idept))

{

cout<<"\n\nThe department name doesnot appear in the database"<<endl<<endl;

break;

}

for(int i=0;i<Vdept.size();i++)

{

if(Vdept[i].name==idept)

{

cout<<"\n\Location : "<<Vdept[i].location<<endl<<"Budget : "<<Vdept[i].budget<<endl;

break;

}

}

cout<<"Instructor for this depar are : "<<endl;

for(int i=0;i<Vins.size();i++)

{

if(Vins[i].dept==idept)

{

cout<<Vins[i].name<<endl;

}

}

break;

case 3:

cout<<"Enter the instructor id : ";

cin>>iId;

cout<<"Enter the instructor name : ";

cin>>iname;

cout<<"Enter the affiliated department name : ";

cin>>idept;

outInstructor.open ("instructor.txt", std::fstream::in | std::fstream::out | std::fstream::app);

outInstructor<<endl<<iId<<","<<iname<<","<<idept;

outInstructor.close();

break;

case 4:

cont=false;

break;

}

}

return 1;

}

int menu()

{

int ch;

cout<<"\n\n1) Enter the instructor ID and I will provide you with the name of the instructor, affiliated department and the location of that department:"<<endl;

cout<<"2) Enter the department name and I will provide you with the location, budget and names of all instructors that work for the department."<<endl;

cout<<"3) Insert a record about a new instructor."<<endl;

cout<<"4) Exit."<<endl;

while(true)

{

cout<<"Enter your choice : ";

cin>>ch;

if(ch<1 || ch>4)

cout<<"\n Invalid choice;";

else

return ch;

}

}

bool isId(vector<instructor>recivedIns,int recivedId)

{

for(int i=0;i<recivedIns.size();i++)

{

if(recivedIns[i].id==recivedId)

return true;

}

return false;

}

bool isDept(vector<department>recivedIns,string recivedName)

{

for(int i=0;i<recivedIns.size();i++)

{

if(recivedIns[i].name==recivedName)

return true;

}

return false;

}

both text file

outputafter adding the new instructor it will save in the file