面向对象的c++程序设计第六版课后习题答案第十章

2) to take dollars and cents (int objects) from the internal representation and generate the external information.
interest rate is a double (decimal) fraction rather
1. Class grading program
I have put statements of programming strategy and of the problem in the program comments.
One
struct StudentRecord
{
int studentNumber;
90 95
enter the student number: 2
enter two 10 point quizes
9 8
enter the midterm and final exam grades. These are 100 point tests
90 80
enter the student number: 3
double InitialBalance();
double BalanceAtMaturity();
int Term();
void input(istream&);
void output(ostream&);
private:
No Answer Provided
5. No Answer Provided
enter two 10 point quizes
7 8
enter the midterm and final exam grades. These are 100 point tests
70 80
enter the student number: 4
enter two 10 point quizes
5 4 0 40 35
Command line command to execute the text run:
ch10prg1 < data
Output:
enter the student number: 1
enter two 10 point quizes
7 10
enter the midterm and final exam grades. These are 100 point tr student number: 1
The quiz grades are: 7 10
The midterm and exam grades are: 90 95
The numeric average is:
and the letter grade assigned is A
Remark:The changes to be made are in the functions that take balance as argument. The implementation of the members must change:
1) to generate the int objects dollars and cents from the external representation of balance (a double)
<< "The numeric average is: " <<
<< endl
<< "and the letter grade assigned is "
<<
<< endl;
}
Data for the test run:
1 7 10 90 95
2 9 8 90 80
3 7 8 70 80
4 5 8 50 70
The record for student number: 4
The quiz grades are: 5 8
The midterm and exam grades are: 50 70
The numeric average is:
and the letter grade assigned is D
cin >> >> ;
cout << << " " <<
<< endl << endl;
}
void computeGrade(StudentRecord& student)
{
n";
abort();
}
= letterGrade[index];
}
void output(const StudentRecord student)
term is stored the same
#include <iostream>
using namespace std;
class CDAccount
{
public:
CDAccount();
CDAccount(double bal, double intRate, int T );
double InterestRate();
output function (ostream&);
Embed in a test program
The code in Display makes the behavior of the required functions clear.
Note on capitalization schemes:I use a slightly different capitalization scheme than the author. You should make your conventions clear to the student. Any capitalization that produces readable code is acceptable to this author. The instructor, as always, is left free to do as is wished.
{
cout << "The record for student number: "
<< << endl
<< "The quiz grades are: "
<< << " " <<
<< endl
<< "The midterm and exam grades are: "
<< << " " <<
<< endl
(uses 3 char args)
a constructor to set month base on month number, 1 = January etc.
a default constructor (what does it do?)
an input function to set the month based on the month number
void output(const StudentRecord student);
int main()
{
StudentRecord student[CLASS_SIZE];
for(int i = 0; i < CLASS_SIZE; i++)
input(student[i]);
<< "These are 100 point tests\n";
5 8
enter the midterm and final exam grades. These are 100 point tests
50 70
enter the student number: 5
enter two 10 point quizes
4 0
enter the midterm and final exam grades. These are 100 point tests
Chapter 10
DEFINING CLASSES AND ABSTRACT DATA TYPES
1. Solutions for and Remarks on Selected Programming Problems
This chapter can be done after Chapter7, Arrays. However, I have not used anything from that chapter in these solutions. Several of these solutions could be simplified in good measure if arrays were used instead of the extensive switch and nested if else statements.
CD account, different interface
Redo the definition of class CDAccount from Project 2 so that the interface is the same but the implementation is different. The new implementation is similar to the second implementation of BankAccount in Display . Here the balance is recorded in two int values, one for dollars, one for cents. The member variable for interest rate stores the interest as a fraction rather than a percentage. Term is stored as in Project 2.