Coding Menggunakan Oop

[atye 0]

salam..

aku nk mintak tolong check kan coding aku wat ni leh x?

ade error la..

lgpon..ade certain2 coding aku xphm nk buat..

nak gune set dan get..

//Student.h ...................header File
class StudentRecord
{
public:
	int stu_ID;
	char grade;
	float stu_Score;

	void student_data();
	void score (int stu_ID, int score);
	void Calc_Score();
	void ShowScore();
	void setStudentGrade(char grade, int total_grade);
	char getStudentGrade();
//	void setStudentScore(double result);
//	int getStudentScore();

};

//Student_Record_Implementation.cpp................CPP file
#include <iostream>
#include "Student.h"
using namespace std;

void StudentRecord::student_data()
{
	cout<<endl<<endl;
	cout<< "Enter the student ID number:";
	cin>> stu_ID;
	cout<<endl<<endl;
}

void StudentRecord::Calc_Score()
{
	cout<< "=============QUIZZES===============\n";
	cout<< "Enter the score for the first quiz: ";
	int quiz1;
	cin>>quiz1;

	cout<< "Enter the score for the second quiz: ";
	int quiz2;
	cin>>quiz2;
	cout<<endl;

	cout<< "=============MID TERM===============\n";
	cout<< "Enter the score for the mid term test: ";
	int midterm;
	cin>>midterm;
	cout<<endl<<endl;

	cout<< "=============FINAL EXAM=============\n";
	cout<< "Enter the score for the final exam: ";
	int final;
	cin>>final;
	cout<<endl<<endl;

	int PerQuiz = ((quiz1+quiz2)*25/20);
	cout<< "The quiz score is " <<PerQuiz<<endl<<endl;

	int PerMidterm = (midterm*25)/100;
	cout<< "The mid term score is " <<PerMidterm<<endl<<endl;

	int PerFinal = (final*50)/100;
	cout<< "The final exam score is " <<PerFinal<<endl<<endl;

	int total_score;
	total_score = PerQuiz+PerMidterm+PerFinal;
	cout<< "The total score for this course is " <<total_score<<endl<<endl;

}

void setStudentGrade(char grade, int total_grade)
{

	if (total_grade<=100 && total_grade >= 90)
		grade = 'A';
	else if (total_grade<=89 && total_grade >= 80)
		grade = 'B';
	else if (total_grade<=79 && total_grade >= 70)
		grade = 'C';
	else if (total_grade<=69 && total_grade >= 60)
		grade = 'D';
	else
		grade = 'F';
}

char StudentRecord::getStudentGrade()
{
	return grade;
}



/*void setStudentScore()
{
	cout<< "=============QUIZZES===============\n";
	cout<< "Enter the score for the first quiz: ";
	int quiz1;
	cin>>quiz1;

	cout<< "Enter the score for the second quiz: ";
	int quiz2;
	cin>>quiz2;
	cout<<endl;

	cout<< "=============MID TERM===============\n";
	cout<< "Enter the score for the mid term test: ";
	int midterm;
	cin>>midterm;
	cout<<endl<<endl;

	cout<< "=============FINAL EXAM=============\n";
	cout<< "Enter the score for the final exam: ";
	int final;
	cin>>final;
	cout<<endl<<endl;

	int PerQuiz = ((quiz1+quiz2)*25/20);
	cout<< "The quiz score is " <<PerQuiz<<endl<<endl;

	int PerMidterm = (midterm*25)/100;
	cout<< "The mid term score is " <<PerMidterm<<endl<<endl;

	int PerFinal = (final*50)/100;
	cout<< "The final exam score is " <<PerFinal<<endl<<endl;

	int total;
	total = PerQuiz+PerMidterm+PerFinal;
	cout<< "The total score for this course is " <<total<<endl<<endl;
}

int StudentRecord::getStudentScore()
{
	return total_score;
}*/


void StudentRecord::ShowScore()
{
//	cout<<"Student Score "<<getStudentScore()<<endl;
	cout<<"Student Grade "<<getStudentGrade()<<endl;

}

// Student_Record_main.cpp........main program
#include <iostream>
#include <fstream>
#include "Student.h"
using namespace std;

int main()
{
	int x;
	StudentRecord score;
	for ( x=0;x<1;x++)
	{
		score.student_data();
		score.Calc_Score();
		score.ShowScore();

		ofstream File("Student Score.txt", ios::app);
		File<<score.getStudentGrade<<endl;

	}
	return 0;
}

ok..aku da wat coding cam kat atas tu..

program ni digunakan oleh lecturer utk mengira markah student..iaitu..

ada 2 kuiz masing2 dengan 10 markah..

ada 1 midterm..markahnye 100

ada 1 final exam..markahnye 100..

kuiz..juz amik 25%...

midterm pon 25%..

and final exam...50%...

aku dah wat calculation..

and dah display semua mark..

cume sekarang ni msalahnye..

aku nak displaykan letter grade iaitu..

kalau mark (setelah dicampur ketiga2 exam)

kalau >90 = A

antara 80-89 = B

anatara 70-79 = C

antara 60-69 = D

bawah 60 = F

aku dah wat coding tu..tapi kuar simbol ape ntah..

ok..masalah kedua..nak wat outfile..

knp bile save kuar no 1 je?

aku harap ade yang dpt bantu aku fix kan masalah ni....

thanx..

Edited April 13, 2008 by atye

[betik 11]

try google struct c++...huhu...ada prob bole tanya...

edit: eh..smlm ko tanya pasal struct kan?...

Edited April 14, 2008 by betik

[atye 0]

try google struct c++...huhu...ada prob bole tanya...

ok..thanx..

[betik 11]

nak gune set dan get..

pada dasarnya, set dan get(dlm erti kata sebenar spt C#, etc) xde dlm C++...dlm C++ ia dipanggil Accessor (tetapi tidak digalakkan)..utk permulaan, gunakan 'One method name' utk accessor ko...

cth:

class X
{
public:
    int    age() const     { return mAge; } //get
    void   age(int age)    { mAge = age; } //set
private:
    int mAge;
};

utk guna :

int a = 0;
X foo1;

foo1.age(8); //set age to 8
a = foo1.age(); //get age

kalau >90 = A antara 80-89 = B anatara 70-79 = C antara 60-69 = D bawah 60 = F aku dah wat coding tu..tapi kuar simbol ape ntah..

ni c0de ko :

void setStudentGrade(char grade, int total_grade){
    if (total_grade<=100 && total_grade >= 90)    
    grade = 'A';
///////////and so on

ko try assign value utk 'grade' yg berada dlm class StudentRecord...ttp setStudentGrade bkn member kpd class tu...pastu ko guna "char StudentRecord::getStudentGrade(){return grade;}" utk memaparkan value dr 'grade' which is only junk data(sbb x initialize semasa class constructor).. kalu ko wat camtu, oleh kerana 'grade' tu adalah public, so ko bole assign value utk dia dgn: StudentRecord sr; sr.grade='A';

ok..masalah kedua..nak wat outfile.. knp bile save kuar no 1 je?

tukar File<<score.getStudentGrade<<endl; kpd: File<<score.getStudentGrade()<<endl; pada keseluruhan, drpd c0de ko, aku rasa ko perlu tahu pasal basic Class dulu... ni cdgn Class utk ko...try implementkan:

class StudentRecord{
private:
    char mGrade;
    float mScore;
public:
    int mID;
    StudentRecord (){ //initialize dlm constructor
        mID=0;
        mGrade=0;
        mScore=0;
    }

    char grade() const {return mGrade;}
    void grade(char gr) {mGrade=gr;}

    float score() const {return mScore;}
    void score(float scr) {mScore = scr;}

};

hint:

1)function spt 'void StudentRecord::Calc_Score()' tidak perlu menjadi ahli kpd class studentRecord...memadai ia meng'set'kan jumlah score menggunakan 'void score(float scr) {mstu_Score = scr;}' <--- cara penggunaan, rujuk atas...

2)sbg latihan jugak, cuba derivekan satu class utk mengira grade (yg dpt exploit mgrade dan mstu_Score) dan lihat perbezaan antara public n private data member (mID is public)...harap2 ko da tau cara utk derive class..

3)pastu kat main()...try guna class tu n paparkan ke screen data2 dr class tu...

happy c0ding...

//aku cuma smpt tengok gitu2 je c0de ko ...tp aku harap apa yg aku poskan dpt membantu...huhu

[atye 0]

owh..cmtu..

aku kne study byk lg la sal class ni..

huhu..

ape pon..thanx..

aku try phmkn n wat cre ko ajr tu..

thnx a lot k..

[Admin2 12]

eh ni macam yang aku dah post tanya betik. cuba tgk post bertajuk aku "camne nak return value bagi character". tapi dalam C programming.

yang ni kot -> http://forum.putera.com/tanya/t55903.html ... betul ke? hehe

[betik 11]

eh ni macam yang aku dah post tanya betik. cuba tgk post bertajuk aku "camne nak return value bagi character". tapi dalam C programming.

yang ni kot -> http://forum.putera.com/tanya/t55903.html ... betul ke? hehe

yg ni len ...yg ni guna class n C++

[otai_g 3]

aku dah try tgk semua coding ko ni.aku rs mcm bnyk yg x kena/lengkap jerk.

1st lec aku ajar kalo nak baca program kena start baca dr main().

n then dlm main() ko tu mn code bg function2 ni semua :

score.student_data();

score.Calc_Score();

score.ShowScore();

x phm betul aku tgk code ko ni.

dekat Student.h pun sama.

mn pegi '}'?

ni cth program yg aku buat.tp aku x masukkan lg function output file.aku memerlukan komen drp otai2 c++ kat sini bg jadikan program aku ni lebih efektif.

//copyright reserved [email protected]

#include <iostream>
using namespace std;

class student
{
private:    
    char grade;
    double tScore;
public:
    int ID;
    void iData();
    void gred();
    void oData();
};

void student::iData()
{
    double kuiz1, kuiz2, midterm, exam;
    double tkuiz, tmidterm, texam;

    cout<<"Masukkan ID : ";
    cin>>ID;
    cout<<"Masukkan markah kuiz 1 (max = 10 markah) : ";
    cin>>kuiz1;
    cout<<"Masukkan markah kuiz 2 (max = 10 markah) : ";
    cin>>kuiz2;
    cout<<"Masukkan markah midterm (max = 100 markah) : ";
    cin>>midterm;
    cout<<"Masukkan markah final exam (max = 100 markah) : ";
    cin>>exam;

    tkuiz = ((kuiz1 + kuiz2) * 25 ) / 20;
    tmidterm = midterm * 0.25;
    texam = exam * 0.5;

    tScore = tkuiz+tmidterm+texam;
}

void student::gred()
{
    if (tScore >= 90.00) grade = 'A';
    else if (tScore >= 80.00) grade = 'B';
    else if (tScore >= 70.00) grade = 'C';
    else if (tScore >= 60.00) grade = 'D';
    else grade = 'F';
}

void student::oData()
{
    cout<<endl<<endl;
    cout<<"Slip Peperiksaan"<<endl;
    cout<<"----------------"<<endl;
    cout<<"No ID : "<<ID<<endl;
    cout<<"Jumlah Markah : "<<tScore<<endl;
    cout<<"Gred : "<<grade<<endl;

}
void main()
{
    student samad;
    samad.iData();
    samad.gred();
    samad.oData();
}