BB10 Calculator Code

Hi, I m making calculator for blackberry z 10 in bb10 software bit i found some errors while appending two strings or no.



void CalcTrial::oneButtonClicked()

{

    // Change the button text when clicked

	if(textf==NULL)
	{

		 textf->setText("1");


	                         }
	                         else
	                         {
	                        	 textf->QString+"1";

	                         }

	                        }



void CalcTrial::twoButtonClicked()

{

	if(textf==NULL)
		                            {

		                             textf->setText("2");
		                         }
		                         else
		                         {
		                        	 textf->QString+"2";

		                         }

		                        }


void CalcTrial::threeButtonClicked()

{

	if(textf==NULL)
		                            {

		                             textf->setText("3");
		                         }
		                         else
		                         {
		                        	 textf->QString+"3";

		                         }

		                        }



void CalcTrial::fourButtonClicked()

{

if(textf==NULL)

{

textf->setText("4");

}

else{

	textf->QString+"4";

}

}



void CalcTrial::fiveButtonClicked()

{

if(textf==NULL)

{

textf->setText("5");

}

else{

  textf->QString+"5";

}

}



void CalcTrial::sixButtonClicked()

{

if(textf==NULL)

{

textf->setText("6");

}

else{
	textf->QString+"6";



}

}



void CalcTrial::sevenButtonClicked()

{

if(textf==NULL)

{

textf->setText("7");

}

else{

	textf->QString+"7";

}

}



void CalcTrial::eightButtonClicked()

{

if(textf==NULL)

{

textf->setText("8");

}

else{

	textf->QString+"8";

}

}



void CalcTrial::nineButtonClicked()

{

if(textf==NULL)

{

textf->setText("9");

}

else{

	textf->QString+"9";

}

}





void CalcTrial::zeroButtonClicked()

{

if(textf==NULL)

{

textf->setText("0");

}

else{

	textf->QString+"0";


}



}







void CalcTrial::addButtonClicked()

{

operation=1;


temp1 =  QString(getchar())+textf;
   textf->setText(NULL);



}



void CalcTrial::minusButtonClicked()
{

operation=2;

temp1 =  QString(getchar())+textf;
textf->setText(NULL);

}



void CalcTrial::mulButtonClicked()

{

operation=3;

temp1 =  QString(getchar())+textf;

  textf->setText(NULL);

}



void CalcTrial::divButtonClicked()

{

	operation=4;


temp1 =  QString(getchar())+textf;
  textf->setText(NULL);

}



void CalcTrial::equalButtonClicked()

{

	temp2 =  QString(getchar())+temp1;



switch (operation) {

case 1:

result=temp1+temp2;

break;

case 2:

result=temp1-temp2;

break;

case 3:

result=temp1*temp2;

break;

case 4:

result=temp1/temp2;

break;





default:

break;

}



textf->text(result);

}

Please help me out.

coder777 (8444)

I'd say that QString is a type. How could it be a member of textf?

textf->QString+"1"; is not supposed to do anything. An assignment (=) operator is required in order to change the content. Like so:
textf->QString+="1"; // Isn't QString a type?

Nikkiiii (9)

actually in .hpp file i declare temp 1 and temp 2 as a qstring so thats why it cannot take integer value. and instead of addition it append the numbers.. so i want to know how to convert string into integer in bb10.

Nikkiiii (9)

@coder777: thanx..
errore are gone nw, program is running.
i use this code to append the no.

if(textf==NULL)
{

textf->setText("0");
}

else
{
textf->setText(textf->text()+"0");
}
}

but nw problem is in switch statement..
instead of addition, substraction, multiplication, division it apppend the two numbers..

This is the code for switch statement:

void CalcTrial::equalClicked()

{

temp2 = textf->text();

switch (count) {

case 1:

result=temp1+temp2;

break;

case 2:

result=temp1-temp2;
break;

case 3:
result=temp1*temp2;
break;

case 4:

result=temp1/temp2;
break;

default:

break;

}

textf->setText(result);
}

coder777 (8444)

This makes no sense:

if(textf==NULL)
{

textf->setText("0");
}

if textf is NULL you cannot use it because it's invalid. What are you trying to do?

instead of addition, substraction, multiplication, division it apppend the two numbers..

I'd guess that temp1 and temp2 are strings. strings are not numbers. If you want numbers you have to convert the content of the string to a number using for instance toInt(). See:

http://qt-project.org/doc/qt-5.1/qtcore/qstring.html#toInt

and then convert it back to the result string using setNum(). See:

http://qt-project.org/doc/qt-5.1/qtcore/qstring.html#setNum

Nikkiiii (9)

Hey thanx @coder777,
I used to.Int() to convert string into integer but i didnt use setNum to again convert it into string at that time.
Now program is running.
Thnax alot.

C++

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BB10 Calculator Code