TASK_1  Define a struct type and a 100-element array
to store information about books in the library (title, author, index, price).
Write a function that will display all the data of "cheap books" on the screen (ie books with price < 10).

TASK_2  Define the struct type and the 50-element array of structures
allowing to store information about factory employees (name, position, gender, salary) 
Write a function that calculates the average salary of women in this factory.

TASK_3  Define the struct type that stores the data of the computer set in the store 
(set name = 50 characters, processor type = 20 characters, clock frequency = positive integer;
price = real number) and a 20-element array of such structures. 
Write a function that determines the index of the cheapest set with the "AMD Athlon" processor.

TASK_4  Define the type of struct type that stores the employee's personal data 
(surname - 20 characters, first name - 15 characters, salary - real number; 
gender - the character 'm' or the character 'f') and a 100-element array of such structures. 
Write a function to check, if the average salary in a given company is greater than 3000.

TASK_5  Define the type of structure that stores the reservation data in the hotel 
(booking date = 30 characters, guest name = 25 characters; room type = letter; 
number of beds = an integer) and a 100-element array of such structures. 
Write a function that counts the number of reservations for the name "Kowalski".

TASK_6  Define the type of structure that stores data about bus connections 
(destination_city: 30 characters; distance: unsigned integer; 
departure_time: real number; price - float number) 
and a 500-element array of such structures. 
Write a function that determines the average ticket price for a route shorter than 10km.

1. Define a struct type and a 100-element array
   to store information about books in the library (title, author, index, price).
   Write a function that will display all the data of "cheap books" on the screen (ie books with price < 10).

#include <iostream.h> // definition of a structural type struct Book {    char title[50];    char author[30];    unsigned index;    float price;  };  // definition of a 100-element array of structures  Book library[100]; // definition of the function displaying "cheap" books // (with the price lower then 10 PLN)  void DISPLAY_CHEAP_BOOKS( Book lib[], int book_counter)  {    bool occurs = false ;    cout << endl << " List of cheap books: ";   for( int i=0; i<book_counter; i++)      if( lib[i].price<10.00 )      {        cout << endl;        cout << endl << " Title: "  << lib[i].title;        cout << endl << " Author: " << lib[i].author;        cout << endl << " Index: "  << lib[i].index;        cout << endl << " Price: "  << lib[i].price;        occurs = true ;      }   if( !occurs )      cout << endl << "The list is empty (no cheap books) ";   cout << endl << " Press the ENTER key ";    cin.get ();  }

 

2. Define the struct type and the 50-element array of structures
   allowing to store information about factory employees (name, position, gender, salary) 
   Write a function that calculates the average salary of women in this factory.

#include <iostream.h> // definition of a structural type struct Employee {    char  name[30];    char  position[30];    char  gender;    float salary;  };  // definition of a 50-element array of structures  Employee list_of_factory_workers[50]; // function calculating the average salary of women float AVERAGE_FEMALE_SALARY( Employee list[], int employee_counter )  {    float sum=0;   int female_counter=0;    for( int i=0; i<employee_counter; i++ )      if( list[i].gender=='f')                  // 'f' like female     {        sum += list[i].salary;       female_counter++;      }   if( female_counter==0 )   {      cout << endl << "Number of women=0. Can't count the average ";     return -1.0;   }   average float ;   average = sum/female_counter;   return average;  }

3. Define the struct type that stores the data of the computer set in the store 
   (set_name = 50 characters, processor type = 20 characters, clock frequency = positive integer;
   price = real number) and a 200-element array of such structures. 
   Write a function that determines the index of the cheapest set with the "AMD Athlon" processor.

#include <string.h> struct ComputerSet  {    char set_name[51];    char processor_type[21];    unsigned clock;    float price;  } ; ComputerSet store[200]; int cheap_AMD( ComputerSet store[], int array_size )  {    int index = -1;    float lowest_price;    for( int i=0; i<array_size; i++ )      if( strcmp( store[i].processor_type, "AMD Athlon") == 0 )        if( index==-1 || store[i].price<lowest_price )        {          index = i;          lowest_price = store[i].price;        }   return index;  }

4. Define the type of struct type that stores the employee's personal data 
   (surname - 20 characters, first name - 15 characters, salary - real number; 
   gender - the character 'm' or the character 'f') and a 100-element array of such structures. 
   Write a function to check, if the average salary in a given company is greater than 3000.

struct EmployeeData {    char  surname [21];    char  name [16];    float salary;    char  gender;  } ; EmployeeData list_of_employees[100]; bool isSalaryGreater( EmployeeData employees_list[],                       int number_of_employees )  {    if( number_of_employees<=0 )      return false ;      // calculating the sum of the salaries   float sum=0;    for ( int i=0; i<number_of_employees; i++)      sum += employees_list[i].salary;   // check the average salary    if( sum/number_of_employees > 3000 )      return true ;    else     return false ;  }

 

5. Define the type of structure that stores the reservation data in the hotel 
   (booking_date = 30 characters, guest name = 25 characters; room_type = letter; 
   number_of_beds = an integer) and a 100-element array of such structures. 
   Write a function that counts the number of reservations for the name "Kowalski".

#include <string.h> struct Reservation {    char booking_date[31];    char guest_name[26];    char room_type;    int  number_of_beds;  } ; Reservation reservation_list[100]; int CountReservationsForKowalski( Reservation reservation_list[] )  {    int counter=0;    for( int i=0; i<100; i++ )    if( strcmp( reservation_list[i].guest_name, "Kowalski") == 0 )      counter ++;    return counter;  }

 

6. Define the type of structure that stores data about bus connections 
   (destination_city: 30 characters; distance: unsigned integer; 
   departure_time: real number; price - float number) 
   and a 500-element array of such structures. 
   Write a function that determines the average ticket price for a route shorter than 10km.

struct BusConnection {    char     destination_city[31];    unsigned distance;    float    departure_time;    float    price;  }; BusConnection timetable[500]; float Average price ( BusConnection timetable[],                       int number_of_connections )  {    float sum_of_selected=0;    int number_of_selected=0;    for( int i=0; i<number_of_connections; i++ )      if( timetable[i].distance <10)      {        sum_of_selected += timetable[i].price;        number_of_selected++;      }   if (number_of_selected == 0)      return -1;   else     return sum_of_selected/number_of_selected;  }