C++ Exam2

Question 1

Class Specification File

Example:

Answer 1

// class specifiation file 
#ifndef RECTANGLE\_H
#define RECTANGLE\_H

// class declaration 
class Rectangle
{
 private: 
 double length; 
 double width;
 public: 
 bool setLength(double);
 bool setWidth(double);
 double getLength();
 double getWidth();
 double calcArea(); 
 };
 #endif

Question 2

Class Function Implementation File

Example

Answer 2

// class function implementation file
#include "Rectangle.h"

bool Rectangle::setLength(double len)
{
bool validData = true;a

if (len >= 0)
length = len;
else
validData = false;

return validData;
}

bool Rectangle::setWidth(double w)
{
bool validData = true;

if (w >= 0)
width = w;
else
validData = false;

return validData;
}

double Rectangle::getLength()
{
return length;
}

double Rectangle::getWidth()
{
return width;
}

double Rectangle::calcArea()
{
return length * width;
}

Question 3

API stands for Application Programming Interface

Answer 3

In computer programming, an application programming interface is a set of subroutine definitions, communication protocols, and tools for building software. In general terms, it is a set of clearly defined methods of communication among various components.

A good API makes it easier to develop a computer program by providing all the building blocks, which are then put together by the programmer.

An API may be for a web-based system, operating system, database system, computer hardware, or software library.

A set of functions and procedures allowing the creation of applications that access the features or data of an operating system, application, or other service.

Question 4

JSON

Answer 4

JavaScript Object Notation and is basically a way of representing data that looks like JavaScript objects.

Question 5

documentation

Answer 5

In computer hardware and software product development, documentation is the information that describes the product to its users. … The term is also sometimes used to mean the source information about the product contained in design documents, detailed code comments, white papers, and blackboard session notes.

Question 6

bubble sort

Answer 6

bubble sort - ascending or descending - swaps adjacent elements - first pass -

inefficient for large arrays because of the repeated swaps and passes

void sort(int num[], int x)

{

int temp;

bool swap;

do

{ swap = false;

for (int y = 0; y < (x-1); y++) // one minus the actual size because the

if statement will compare the next highest value

{

if (num[y] > num[y+1])

{

temp = num[y];

num [y] = num[y+1];

num[y+1] = temp;

swap = true;

}

}

}while(swap);

}

Question 7

struct defined and intialized

Answer 7

struct Date

{

int month,

day,

year;

};

Date JasonBday = {1, 29, 1981); // Date variable defined and initialized

Question 8

structure declaration

Answer 8

// structure declaration

struct Employee {

string name;

int vacationDays,

daysUsed;

Employee(string n = “”, int d = 0) // Default constructor

{

name = n;

vacationDays = 10;

daysUsed = d;

}

};

Question 9

passing structures to functions

Answer 9

preferable to pass by constant reference to functions

void showIte(const InvItem &); // Prototype

void showItem(const InvItem &item) // Header

Question 10

simple PayRoll struct

Answer 10

struct PayRoll // Initialization list (set of memory locations)

{

int empNumber;

string name;

double hours,

payRate,

grossPay;

};

Payroll deptHead, foreman, associate; // Define variables of the Payroll

structure

Question 11

PayRoll struct continued

Answer 11

deptHead.empNumber = 475;

foreman.empNumber = 897;

associate.empNumber = 729;

cout << “Enter the employee’s name: “; // example of input into a member

variable of the Payroll struct

getline(cin, associate.name);