Thread: What is wrong

what is wrong in this code? when i compile i get the following error:
Error 'newcoordinate':undeclared identifier

Code:

#include "stdafx.h"
#include <iostream>
using std::cout;
using std::cin;
//using std::endl;

class Test
{
private:
	double coordinate;
public:
	Test();
	~Test();
	double getcoordinate();
	void setcoordinate(double newcoordinate);
};

Test::Test()
{
}
Test::~Test()
{
}

double Test::getcoordinate()
{
	return coordinate;
}

void Test::setcoordinate(double newcoordinate)
{
	
	cout<<"please give coordinate"<<'\n';
	cin>>newcoordinate;
	coordinate = newcoordinate;
	cout<<"The number you gave is"<<coordinate;

	
}

int main()
{
	Test number;
	number.setcoordinate(newcoordinate);
	return 0;
}

The usage of newcordinate in Test::setcoordinate() is local to that function. To use a variable with that name in main(), you need to change main() to read something like;

Code:

int main()
{
	Test number;
        double newcoordinate;
	number.setcoordinate(newcoordinate);
	return 0;
}

That will shut up the compiler, at least.

You're mixing up a couple of practical things in your code though; I suggest removing responsibility from your Test class to read value of a coordinate. That means, firstly, changing Test::setcoordinate() to something like;

Code:

void Test::setcoordinate(double newcoordinate)
{
	coordinate = newcoordinate;
}

and changing main() to;

Code:

int main()
{
	Test number;
        double newcoordinate;

	
	cout<<"please give coordinate"<<'\n';
	cin>>newcoordinate;

	number.setcoordinate(newcoordinate);

        cout<<"The number you gave is"<< number.getcoordinate() 
              << " which should be the same as " << newcoordinate << '\n';

	return 0;
}

> number.setcoordinate(newcoordinate);

Where is the value of newcoordinate?

Actually the member function setcoordinate is a bir strange! You call it by a value (which is then assigned to the private varialbe coordinate), but in the function, you prompt the user to enter another value for this purpose!?

Thnk you all!