Difference between Qt Strings Functions

[saad_saadi]

I made a project on VS2005 using Qt -4.7.4 version. In that project i used lineEdit and took the text from lineEdit like this

const char* test= lineEdit->text().toStdString().c_str();

const char* test= lineEdit->text().toStdString().c_str();

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The above line worked perfectly but now i am using VS2010 and using the same above line but it is not showing me anything for the test variable.

qDebug()<<lineEdit->text()<<endl;

qDebug()<<lineEdit->text()<<endl;

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The above line is printing the right value of lineEdit but when i am using the `std::string` and then using

cout

. it is not showing any value on

VS2010

. So then i used

const char* test= lineEdit->text().toLatin1().data();

const char* test= lineEdit->text().toLatin1().data();

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this above line is now showing me everything perfectly on VS2010.

I have no idea why

const char* test= lineEdit->text().toStdString().c_str();

const char* test= lineEdit->text().toStdString().c_str();

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is working perfectly on

VS2005

and why not on

VS2010

. Can anyone please guide me where i m doing wrong. Thanks