Question 1

What is the reason for separating the interface from the implementation of an ADT?

Accepted Answer

The answer of What is the reason for separating the...

Question 2

The scope resolution operator can be used with an object to qualify a member function.

Accepted Answer

The scope resolution operator (::) is used to qualify hidden names or to specify a class or namespace scope, not to access a member function of an object instance. Member functions are accessed using the dot (.) or arrow (->) operators depending on whether the object is accessed directly or through a pointer.

Question 3

Here are several different initializations of a structure variable.State what happens in each initialization.
struct WeatherData
{
int temperature;
int windChill;
int windSpeed;
};
a)WeatherData prediction ={ };
b)WeatherData prediction ={40};
c)WeatherData prediction ={40,-10,};
d)x WeatherData prediction ={40,-10,20 };

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Question 4

What is the error in the following structure definition?
struct A
{
int b;
int c;
}
int main()
{
A x;
// other code
}

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Question 5

In the structure definition
struct StudentRecord
{
int studentID;
char grade;
}
give the structure tag,and each of the member names.

Accepted Answer

The answer of In the structure definition
struct StudentRecord
{
int studentID;
char grade;
}
give...

Question 6

C++ allows the programmer to deal with data at a higher level of abstraction in part because related data of differing types can be treated as a unit in
A)a array variable
B)a structure variable
C)a function
D)a library
E)a class variable

Accepted Answer

The answer of C++ allows the programmer to deal with...

Question 7

The dot operator is used between an object and a data member or between a calling object and a call to a member function from the class of the object.

Accepted Answer

This statement is true. The dot operator (.) is used to access data members and member functions of an object in C++. It is used to indicate the relationship between the object and its member. The left-hand side of the dot operator is the object, and the right-hand side is the member being accessed or called.

Question 8

Given the ShoeType structure type-definition.Write a function for the declaration (prototype).
struct ShoeType
{
 char style;
 double price;
};
void setSalePrice(ShoeType& Item,double discountRate);
//discountRate =(discounted price)/(regular price)
//Adjusts sale price to reflect the specified discount.

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Question 9

Carefully distinguish between the scope resolution operator,and the dot operator.

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Question 10

It seems that mutator and accessor functions defeat the purpose of making the member variables private.Why is this not so?

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Question 11

Carefully define mutator and accessor functions of a class.

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Question 12

Given the ShoeType structure type definition.Write a function for the declaration (prototype).
struct ShoeType
{
 char style;
 double price;
};
void readShoeRecord(ShoeType& Item);
// Prompts for data and fills ShoeType argument members

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The answer of Given the ShoeType structure type definition.Write a...

Question 13

What is the output of the following program.?
#include <iostream>
using namespace std;
struct ShoeType
{
 char style;
 double price;
};
int main()
{
 ShoeType shoe1,shoe2;
 shoe1.style = 'P';
 shoe1.price = 98.98;
 cout << shoe1.style << " $" << shoe1.price << endl;
shoe2 = shoe1;
//Put shoe2 on sale!
shoe2.price = shoe1.price/2;
cout << shoe2.style << " $" << shoe2.price << endl;
}

Accepted Answer

The answer of What is the output of the following...

Question 14

Write a definition for a structure type for personnel records for hourly employees.The record contains an hourly wage rate,accrued vacation in an integer number of days,and employee status (use 'T' for temporary and 'P' for permanent).Part of the problem is appropriate choices of type and member names.

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Question 15

Carefully identify,define each term and give differences between the implementation and the interface of an abstract data type (ADT).This requires a bit more writing of English than other question on this test.

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Question 16

A member of a structure or of a class is accessed using the
A)Comma operator
B)The dot operator
C)The indexing operator
D)The ampersand operator

Accepted Answer

The dot operator (.) is used to access a member of a structure or class. It allows us to access the public members of the structure or class.

Question 17

Given the ShoeType structure type definition,write a function declaration (prototype)for a void function that uses a ShoeType structure variable as a value parameter.
struct ShoeType
{
 char style;
 double price;
};

Accepted Answer

The answer of Given the ShoeType structure type definition,write a...

Quiz 6: Structures and Classes

What is the reason for separating the interface from the implementation of an ADT?

The scope resolution operator can be used with an object to qualify a member function.

What is the error in the following structure definition? struct A { int b; int c; } int main() { A x; // other code }

In the structure definition struct StudentRecord { int studentID; char grade; } give the structure tag,and each of the member names.

C++ allows the programmer to deal with data at a higher level of abstraction in part because related data of differing types can be treated as a unit in

The dot operator is used between an object and a data member or between a calling object and a call to a member function from the class of the object.

Carefully distinguish between the scope resolution operator,and the dot operator.

It seems that mutator and accessor functions defeat the purpose of making the member variables private.Why is this not so?

Carefully define mutator and accessor functions of a class.

Given the ShoeType structure type definition.Write a function for the declaration (prototype). struct ShoeType { char style; double price; }; void readShoeRecord(ShoeType& Item); // Prompts for data and fills ShoeType argument members

Carefully identify,define each term and give differences between the implementation and the interface of an abstract data type (ADT).This requires a bit more writing of English than other question on this test.

A member of a structure or of a class is accessed using the

Given the ShoeType structure type definition,write a function declaration (prototype)for a void function that uses a ShoeType structure variable as a value parameter. struct ShoeType { char style; double price; };