What is wrong with my code?

[Dante]

Excuse me but can someone answer my question

[wysota]

What is the question?

[Dante]

Oh your right
well how can i use sin,cos,tan and sqrt
and how can i make the lineEdit to show numbers with more than 6 zeros(not user input)without using scientific notation and how can i make it to show floating pomt numbers with more than 5 digits after point(not user input) and one thing about user input the second quoted line in my two last post must make the lineEdit to accept just 10 integers after point but you can enter as many as you want.
How can i correct problems above?

[spirit]

Oh your right
well how can i use sin,cos,tan and sqrt

just include "#include <math.h>".

[wysota]

just include "#include <math.h>".

Or better yet "#include <cmath>" and use the std namespace.

About significant digits - remember floats have a limited precision. Use double instead of float wherever necessary. Scientific notation and "regular" notation has nothing to do with precision. If the precision is not what you wanted and you know the datatype can handle the required precision, it means you must have made a mistake while setting up the widget.

[Dante]

I included <cmath> and entered the line:

using namespace std

but it still gives the same error
and what you mean by making a mistake while setting up the widget?

[wysota]

Ok, but what is the error?

[Dante]

The one in i mentioned in my fourth post.

[address] ~ can not be used as a function

[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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at the top

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?