課題のためにクラスを作成する必要があります。できる限りのことを行い、調査を行い、教科書を読みました。メインランにあるものを作成するには、クラスに対して他に何をする必要がありますか? 知っておくべきことはすべて、コードの説明にあります。
/* LAB07.cpp
ALEXANDER YHAP
04/2012
In this lab you will create a new class called LabMetaData. Objects of this
class could be used in future lab assignments to store information about
the lab itself.
An object of class LabMetaData has the following attributes:
. Lab Number - A whole, positive number. Zero is valid.
. Lab Title - A title for the Lab Assignment
. Lab Author - The name of the programmer that wrote the lab.
. Lab Data - The date the lab was written, stored as three integer
numbers. The Day must be between 1 and 31. The month must be between 1
and 12. The year must be 4 digits and in the 21st Century (between 2000
and 2099).
. Lab Description - A description of the Lab Assignment.
An object of class LabMetaData has the following methods:
. Constructor - set the Lab Number to zero, the Lab date to 1/1/2010,
and all other attributes to empty strings. (Hint: call the SetData()
from the constructor function to avoid duplicating your code)
. SetData() - sets the attributes of the object to the parameters as long
as the parameters are valid. Rules:
o ALL of the parameters must be valid in order for ANY of the
attributes to change.
o Validation rules are explained above for Lab Number and Lab Date.
Title, Author, and Description have no validation.
o If no problems are detected, return TRUE. Otherwise return FALSE.
. ShowData() - displays all the object's attributes on the console.
The main() function and a sample executable is provided.
*/
#include <iostream>
using namespace std;
//Class Declaration Section
class LabMetaData
{
private:
int labNum;
string labTitle;
string labAuthor;
int Month;
int Day;
int Year;
string labDesc;
public:
// LabMetaData(int labNum, string labTitle, string labAuthor,int Month, int Day, int Year, string labDesc); //constructor
LabMetaData(int = 0, string = "Empty Title", string = "Empty Author",int = 01, int = 01, int = 2012, string = "Empty Description");
void LabMetaData::SetData(int, string, string, int, int, int, string);
void LabMetaData::ShowData();
};
//Class Implementation Section
LabMetaData::LabMetaData(int Num, string Title, string Author, int MM, int DD, int YYYY, string Desc)
{
labNum = Num;
labTitle = Title;
labAuthor = Author;
Month = MM;
Day = DD;
Year = YYYY;
labDesc = Desc;
}
void LabMetaData::SetData(int Num, string Title, string Author, int MM, int DD, int YYYY, string Desc)
{
// labNum = 7;
// labTitle = "N/A";
// labAuthor = "Unknown";
// Month = 01;
// Day = 01;
// Year = 2012;
// labDesc = "N/A";
// return;
labNum = Num;
labTitle = Title;
labAuthor = Author;
Month = MM;
Day = DD;
Year = YYYY;
labDesc = Desc;
return;
}
void LabMetaData::ShowData()
{
cout << "Lab " << labNum << ": " << labTitle << endl;
cout << "Created by: " << labAuthor << endl;
cout << "Date: " << Month << "/" << Day << "/" << Year << endl;
cout << "Description: " << labDesc << endl;
cout << endl;
return;
}
int main()
{
LabMetaData Lab7;
cout << endl << "Uninitialized: " << endl;
Lab7.ShowData();
Lab7.SetData(7,
"Introduction to Classes",
"Alexander Yhap",
10, 3, 2010,
"In this lab you will create a new class called LabMetaData. Objects of this class could be used in future lab assignments to store information about the lab itself.");
cout << endl << "Intialized: " << endl;
Lab7.ShowData();
if(!Lab7.SetData(-1, "Test", "Test", 13, 32, 11, "Causing Errors"))
cout << "\nErrors!" << endl;
cout << endl << "After Invalid Modification Attempt: " << endl;
Lab7.ShowData();
cout << endl << endl;
system("pause");
return 0;
}
エラー メッセージは次のとおりです。
prog.cpp:32:27: error: no 'void LabMetaData::SetData()' member function declared in class 'LabMetaData'
prog.cpp:44:28: error: no 'void LabMetaData::ShowData()' member function declared in class 'LabMetaData'
prog.cpp: In function 'int main()':
prog.cpp:58:17: error: no matching function for call to 'LabMetaData::LabMetaData()'
prog.cpp:21:1: note: candidates are: LabMetaData::LabMetaData(int, std::string, std::string, int, int, int, std::string)
prog.cpp:5:1: note: LabMetaData::LabMetaData(const LabMetaData&)
prog.cpp:61:10: error: 'class LabMetaData' has no member named 'ShowData'
prog.cpp:63:10: error: 'class LabMetaData' has no member named 'SetData'
prog.cpp:66:10: error: 'class LabMetaData' has no member named 'ShowData'
prog.cpp:68:9: error: 'Lab4' was not declared in this scope
prog.cpp:72:10: error: 'class LabMetaData' has no member named 'ShowData'