Question

1. Define a structure named StockItem with two string fields, supplier and productName and one int field, catalogNumber. Then define a structure named Customerwith string fields name, streetAddress, city, postalCode, phone. Assume that structures named Date and Money have already been defined (representing a date and amonetary amount respectively.
Finally, define a structure named Purchase that has these fields: buyer of type Customer, itemSold of type StockItem, dateOfSale of type Date, paid of type Money,returnable of type bool.
2. In mathematics, the distance between one point (A) and another point (B), each with coordinates (x,y), can be computed by taking the differences of their xcoordinates and their y coordinates and then squaring those differences. The squares are added and the square root of the resulting sum is taken and... voila! Thedistance. Assume that Point has already been defined as a structured type with two double fields, x and y. Define a function dist that takes two Point argumentsand returns the distance between the points they represent.
3. Assume that Point has already been defined as a structured type with two double fields, x and y. Write a function, getPoint that returns a Point value whosefields it has just read in from standard input. Assume the value of x precedes the value of y in the input.

Answer 1

Prgram 1:

Definition of each structure is given below along with comments.

// Definition of the structure Date.

struct Date

{

     char date[SIZE];

};

// Definition of the structure Money.

struct Money

{

     char amount[SIZE];

};

// Definition of the structure StockItem.

struct StockItem

{

     // Declare variables.

     char supplier[SIZE];

     char productName[SIZE];

     int catalogNumber;

};

// Definition of the structure Customer.

struct Customer

{

     // Declare member variables.

     char name[SIZE], streetAdress[SIZE], city[SIZE];

     int postalCode;

     int phoneNumber;

};

// Definition of the structure Purchase.

struct Purchase

{

     // Declare the variable buyer of the

     // type structure Customer.

     Customer buyer;

     // Declare the variable itemSold of the

     // type structure StockItem.

     StockItem itemSold;

     // Declare the variable dateOfSale of the

     // type structure date.

     Date dateOfSale;

     // Declare the variable paid of the

     // type structure Money.

     Money paid;

     // Boolean function of the type structure Purchase.

     bool get()

     {

          return 0;

     }

};

To test the above stuctures the below program is provided.

Program code:

#include "stdafx.h"

#include<iostream>

const int SIZE = 20;

// Definition of the structure Date.

struct Date

{

     char date[SIZE];

};

// Definition of the structure Money.

struct Money

{

     char amount[SIZE];

};

// Definition of the structure StockItem.

struct StockItem

{

     // Declare variables.

     char supplier[SIZE];

     char productName[SIZE];

     int catalogNumber;

};

// Definition of the structure Customer.

struct Customer

{

     // Declare member variables.

     char name[SIZE], streetAdress[SIZE], city[SIZE];

     int postalCode;

     int phoneNumber;

};

// Definition of the structure Purchase.

struct Purchase

{

     // Declare the variable buyer of the

     // type structure Customer.

     Customer buyer;

     // Declare the variable itemSold of the

     // type structure StockItem.

     StockItem itemSold;

     // Declare the variable dateOfSale of the

     // type structure date.

     Date dateOfSale;

     // Declare the variable paid of the

     // type structure Money.

     Money paid;

     // Boolean function of the type structure Purchase.

     bool get()

     {

          return 0;

     }

};

int main()

{

     bool flag;

     Purchase p;

     // call the method of bool type from the structure   Purchase

     // which returns a Boolean value.

     flag = p.get();

     std::cout << flag << "\n";

     system("pause");

     // Returns a Boolean value

     return flag;

}

Sample Output:

Program 2:

Definition of the function dist that takes two Point arguments and returns the distance between the points:

Note: I have tested this function using the program.

Complete program code to test the above function:

Sample Output:

Complete program code to copy:

#include "stdafx.h"

#include<iostream>

#include<iomanip>

#include<math.h>

using namespace std;

//Point structure

struct Point

{

public:

     double x;

     double y;

};

// Funtion prototype.

double dist(Point, Point);

// Definition of the function

double dist(Point temp1, Point temp2)

{

     double power1, power2, diff;

// Find the difference between x coordinates and y coordinates

     // and then square the differences.

     power1 = pow((temp1.x - temp2.x), 2);

     power2 = pow((temp1.y - temp2.y), 2);

     // Add the sqaures.

     diff = power1 + power2;

     // Apply sqaure root to the sum.

     diff = sqrt(diff);

     // Return the distance between the points.

     return diff;

}

// Definition of the main() function.

int main()

{

     Point p1, p2;

     cout<<"Enter point A (x1,y1)."<<endl;

     cout << "Enter x1-value: ";

     cin >> p1.x;

     cout << "Enter y1-value: ";

     cin >> p1.y;

     cout<<"Enter point B (x2,y2)."<<endl;

     cout << "Enter x2-value: ";

     cin >> p2.x;

     cout << "Enter y2-value: ";

     cin >> p2.y;

cout << setprecision(2) << "Distance between" << "("<< p1.x << "," << p1.y << ") and" <<

"(" << p2.x << "," << p2.y << ") is" <<

    distancexy(p1, p2)<<endl;

     system("pause");

     return 0;

}

Progarm 3:

Definition of the structure Point and the function getPoint():

Note: i have tested this function using the program.

Complete progarm code to test the above function:

Sample output:

Complete program code to copy:

#include "stdafx.h"

#include<iostream>

using namespace std;

// Define structure Point.

struct Point

{

     double x;

     double y;

};

// Definition of the function getPoint().

struct Point getPoint()

{

     struct Point a;

     //Read the Point value.

     cout << "Enter x value of the point: ";

     cin >> a.x;

     cout << "Enter y value of the point: ";

     cin >> a.y;

     // Return the Point value.

     return a;

}

// Define main() function.

int main()

{

     // Create an object a of type structure Point.

     struct Point p;

     // Call the function getPoint().

     p = getPoint();

     // Print the Point value

     cout << "The point is: " << "(" << p.x << "," << p.y     

     << ")" << endl;

     system("pause");

     return 0;

}