Ad:

C++ Discussion Thread
Marked Solved
Views: 739

Mar 31st, 2008

class

Expand Post »

hi ,
my program calculate the area of rectangle , and I have some errors , and dont know how to correct them .
this is the program ,

C++ Syntax (Toggle Plain Text)
#include<iostream>
using namespace std;
class Rectangle {
private:
	double length ,width ;
public:
	double getW();
	double getL();
	void setW();
	void setL();							double findArea(double&;double&);
	void display();
};
double Rectangle::getW(){
	return width ;
}
double Rectangle::getL(){
	return length ;
}
 
 
 
void Rectangle::setW(double num1){
 
	width=num1;
}
void Rectangle::setL(double num2){
	length=num2;
}
double Rectangle::findArea(double &w;double &l){
	int area;
	w=width;
	l=length;
	area=length*width;
	return area ;
 
void Rectangle::display(){
	cout<<length<<endl;
	cout<<width<<endl;
}
int main (){
	double x=8.3,y=5.8;
	Rectangle rec ;
	rec.setW(x);
	rec.setL(y);
	rec.getW();
	rec.getL();
	rec.findArea(x,y);
	rec.display();
}
return 0 ;
}
#include<iostream>
using namespace std;
class Rectangle {
private:
	double length ,width ;
public:
	double getW();
	double getL();
	void setW();
	void setL();							double findArea(double&;double&);
	void display();
};
double Rectangle::getW(){
	return width ;
}
double Rectangle::getL(){
	return length ;
}



void Rectangle::setW(double num1){

	width=num1;
}
void Rectangle::setL(double num2){
	length=num2;
}
double Rectangle::findArea(double &w;double &l){
	int area;
	w=width;
	l=length;
	area=length*width;
	return area ;

void Rectangle::display(){
	cout<<length<<endl;
	cout<<width<<endl;
}
int main (){
	double x=8.3,y=5.8;
	Rectangle rec ;
	rec.setW(x);
	rec.setL(y);
	rec.getW();
	rec.getL();
	rec.findArea(x,y);
	rec.display();
}
return 0 ;
}

Last edited by bis student; Mar 31st, 2008 at 10:19 am.

Similar Threads

java and using observable class in Java
Accessing functions from base class in C
Circle class in C++
"missing storage-class or type specifiers" error in C++
first math class in uni in Geeks' Lounge

bis student

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

16 posts
since Dec 2007

Permalink

Mar 31st, 2008

Re: class

To start with change

findArea(double&;double &)

to

findArea(double&,double &)

replace the ';' with ','

arguments in a function defn n decl are separated by comma not semi-colon

Agni

Featured Poster

Reputation Points: 431

Solved Threads: 116

Practically a Master Poster

Offline

654 posts
since Dec 2007

Permalink

Mar 31st, 2008

Re: class

but it is still have errors,

bis student

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

16 posts
since Dec 2007

Permalink

Mar 31st, 2008

Re: class

set the prototype of functions
like this

C++ Syntax (Toggle Plain Text)
void setW();
void setL();
void setW();
void setL();

replace above two with

C++ Syntax (Toggle Plain Text)
void setW(double num1)
void setL(double num2)
void setW(double num1)
void setL(double num2)

remember to add semicolon where required.

Last edited by Laiq Ahmed; Mar 31st, 2008 at 10:44 am. Reason: Hinting

Laiq Ahmed

Reputation Points: 113

Solved Threads: 20

Junior Poster

Offline

147 posts
since Jun 2006

Permalink

Mar 31st, 2008

Re: class

C++ Syntax (Toggle Plain Text)
#include<iostream>
using namespace std;
class Rectangle {
private:
	double length ,width ;
public:
	double getW();
	double getL();
	void setW(); //<-Needs to pass a double
	void setL(); //<- Needs to pass a double						
	double findArea(double&;double&); //<-See chandra.rajat's post
	void display();
};
double Rectangle::getW(){
	return width ;
}
double Rectangle::getL(){
	return length ;
}
 
 
 
void Rectangle::setW(double num1){//<-Doesn't match prototype
 
	width=num1;
}
void Rectangle::setL(double num2){//<-Doesn't match prototype
	length=num2;
}
double Rectangle::findArea(double &w;double &l){//<-See chandra.rajat's post
	int area;
	w=width;
	l=length;
	area=length*width;
	return area ;
/*} <-Missing a closing curly brace here*/
 
void Rectangle::display(){
	cout<<length<<endl;
	cout<<width<<endl;
}
int main (){
	double x=8.3,y=5.8;
	Rectangle rec ;
	rec.setW(x);
	rec.setL(y);
	rec.getW();
	rec.getL();
	rec.findArea(x,y);
	rec.display();
}//<-Extra curly brace
return 0 ;
}
#include<iostream>
using namespace std;
class Rectangle {
private:
	double length ,width ;
public:
	double getW();
	double getL();
	void setW(); //<-Needs to pass a double
	void setL(); //<- Needs to pass a double						
	double findArea(double&;double&); //<-See chandra.rajat's post
	void display();
};
double Rectangle::getW(){
	return width ;
}
double Rectangle::getL(){
	return length ;
}



void Rectangle::setW(double num1){//<-Doesn't match prototype

	width=num1;
}
void Rectangle::setL(double num2){//<-Doesn't match prototype
	length=num2;
}
double Rectangle::findArea(double &w;double &l){//<-See chandra.rajat's post
	int area;
	w=width;
	l=length;
	area=length*width;
	return area ;
/*} <-Missing a closing curly brace here*/

void Rectangle::display(){
	cout<<length<<endl;
	cout<<width<<endl;
}
int main (){
	double x=8.3,y=5.8;
	Rectangle rec ;
	rec.setW(x);
	rec.setL(y);
	rec.getW();
	rec.getL();
	rec.findArea(x,y);
	rec.display();
}//<-Extra curly brace
return 0 ;
}

Aside from chandra.rajat's observations, there are just a couple of prototype mismatches and a missing/hanging curly brace.

BlackJavaBean

Reputation Points: 13

Solved Threads: 7

Light Poster

Offline

38 posts
since Feb 2008

This thread is solved

Either the thread starter or a moderator has marked this thread as solved. You can most likely trust the responses and answers given. There is most likely no reason for any further responses to be posted here. If you have a related question, please start a new thread in this forum instead.

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in C++ Forum Timeline: deleting a random node from a singly linked list

Next Thread in C++ Forum Timeline: Converting Integer to double

DaniWeb Message

Cancel Changes

User Name
Password