Question

11.9: Speakers Bureau

Write a program that keeps track of a speaker's bureau. The program should use a structure to store the following data about a speaker:

• Name
• Telephone Number
• Speaking Topic
• Fee Required

The program should use an array of at least 10 structures. It should let the user enter data into the array, change the contents of any element, and display all the data stored in the array. The program should have a menu-driven interface.

Input Validation: When the data for a new speaker is entered, be sure the user enters data for all the fields. No negative amounts should be entered for a speaker's fee.

It's only on myprogramminglab.com for the c++ language course.

Answer 1

#include <iostream>
#include<iomanip>
using namespace std;

// Speaker structure
struct Speaker
{
string name;
string phone;
string topic;
double fee;
};

void display(Speaker speaker_array[], int total_speakers)
{
// Print header
cout<<left<<setw(15)<<"Name"<<left<<setw(15)<<"Phone"<<left<<setw(15)<<"Topic"<<left<<setw(15)<<"Fees"<<endl;

// Iterate over array and print all details of speakers
for(int i=0; i<total_speakers; i++)
{
cout<<left<<setw(15)<<speaker_array[i].name<<left<<setw(15)<<speaker_array[i].phone<<left<<setw(15)<<speaker_array[i].topic<<left<<setw(15)<<fixed<<setprecision(2)<<speaker_array[i].fee<<endl;
}
cout<<endl;
}

int main()
{
//size of array
int SIZE=5;
// Array of structure Speaker type
Speaker speaker_array[SIZE];
// Total speakers entered by user
int total_speakers = 0;
// Option to check if user wants to exit
int option = 0;

// Local variable
bool nameFound;
string name;
Speaker speaker;

// Iterate loop till option is not 4
while(option!=4)
{
// Display menu
cout<<"MENU: "<<endl;
cout<<"1) Add Speaker"<<endl;
cout<<"2) Change Speaker"<<endl;
cout<<"3) Display All Speakers"<<endl;
cout<<"4) Exit"<<endl;

// Ask to choose an option
cout<<"Enter option: ";
cin>>option;
cin.ignore();
// Use switch-case to determine which action to perform
switch(option)
{
case 1:
// Check if array is not full
// If not, ask for speakers details
// add speaker to array
// Increment total_speaker by 1
if(total_speakers<SIZE)
{
cout<<"Enter name: ";
getline(cin,speaker.name);
cout<<"Enter Phone number: ";
getline(cin,speaker.phone);
cout<<"Enter topic: ";
getline(cin,speaker.topic);
cout<<"Enter fees: ";
cin>>speaker.fee;
// Validate fee
while(speaker.fee<0)
{
cout<<"Enter fees: ";
cin>>speaker.fee;
}
cin.ignore();
speaker_array[total_speakers] = speaker;
total_speakers+=1;
}
else
{
cout<<"Array is full"<<endl;
}
break;
case 2:
// Ask for the speaker name to be changed
cout<<"Enter name of speaker to be changed: ";
getline(cin,name);
// set false initially
nameFound = false;
// Iterate over array, if name found
// ask for new details
// set nameFound to true
for(int i =0; i<total_speakers; i++)
{
if(speaker_array[i].name==name)
{
cout<<"Enter new name: ";
getline(cin,speaker_array[i].name);
cout<<"Enter Phone number: ";
getline(cin,speaker_array[i].phone);
cout<<"Enter topic: ";
getline(cin,speaker_array[i].topic);
cout<<"Enter fees: ";
cin>>speaker_array[i].fee;
while(speaker_array[i].fee<0)
{
cout<<"Enter fees: ";
cin>>speaker_array[i].fee;
}
cin.ignore();
nameFound = true;
break;
}
}
// If nameFound is false, means name is not found
if(!nameFound)
{
cout<<"Speaker does not exist"<<endl;
}
break;
case 3:
// call function to display content of array
display(speaker_array,total_speakers);
break;
case 4:
cout<<"Exit"<<endl;
break;
default:
cout<<"Invalid option"<<endl;
break;
}
cout<<endl;
}
return 0;
}

OUTPUT