What is wrong with my code?

[spirit]

can you show us how you call this method? please, provide relevant code.

[Dante]

with having :

#include <QtGui>
#include <cmath>
#include "Calc++.h"
 
using namespace std;

#include <QtGui>
#include <cmath>
#include "Calc++.h"

using namespace std;

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else if (operation.contains("sqrt"))
		if(m_op1<0){
			lineEdit->setAlignment(Qt::AlignLeft);
			lineEdit->setText("Sqrt accepts just positive numbers.");
		}
		else lineEdit->setText(QString::number(sqrt(m_op1)));
	else if (operation.contains("sin"))
		lineEdit->setText(QString::number(sin(m_op1)));
	else if (operation.contains("cos"))
		lineEdit->setText(QString::number(cos(m_op1)));
	else if (operation.contains("tan"))
		lineEdit->setText(QString::number(tan(m_op1)));

else if (operation.contains("sqrt"))
		if(m_op1<0){
			lineEdit->setAlignment(Qt::AlignLeft);
			lineEdit->setText("Sqrt accepts just positive numbers.");
		}
		else lineEdit->setText(QString::number(sqrt(m_op1)));
	else if (operation.contains("sin"))
		lineEdit->setText(QString::number(sin(m_op1)));
	else if (operation.contains("cos"))
		lineEdit->setText(QString::number(cos(m_op1)));
	else if (operation.contains("tan"))
		lineEdit->setText(QString::number(tan(m_op1)));

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[spirit]

I don't see any problem. it should work fine.

[Dante]

So what should i do?

[spirit]

try to rebuild all project, make make clean, qmake, make.

[Dante]

No result!

[spirit]

ok, attach you sources again.

[Dante]

Hey we have a proverb that says

a shot in darkness

that means doing sth not very wise when you have no hope.well i did the same.
I added "std::" before those functions and i understood that there is no difference whether or not you write the line "using namespace std;" and you know,It worked.
thanks all of you