QString to char* conversion

c++ qt qstring qtcore
mawia picture mawia · Mar 26, 2010 · Viewed 185.7k times · Source

I was trying to convert a QString to char* type by the following methods, but they don't seem to work.

//QLineEdit *line=new QLineEdit();{just to describe what is line here}

QString temp=line->text();
char *str=(char *)malloc(10);
QByteArray ba=temp.toLatin1();
strcpy(str,ba.data());

Can you elaborate the possible flaw with this method, or give an alternative method?

Answer

Eli Bendersky picture Eli Bendersky · Mar 26, 2010

Well, the Qt FAQ says:

int main(int argc, char **argv)
{
 QApplication app(argc, argv);
  QString str1 = "Test";
  QByteArray ba = str1.toLocal8Bit();
  const char *c_str2 = ba.data();
  printf("str2: %s", c_str2);
  return app.exec();
}

So perhaps you're having other problems. How exactly doesn't this work?

Related questions

QByteArray to QString

I'm having issues with QByteArray and QString. I'm reading a file and stores its information in a QByteArray. The file is in unicode, so it contains something like: t\0 e\0 s\0 t\0 \0 \0 I'm trying to compare this value to my …

Read More
Convert const char* to QString

I have to use the output of a function of a type const char* and I need to convert it to QString. Note: inside that function, these are lines of code to return the const char* char* ClassA::getData() const{ …

Read More
QString:number with maximum 2 decimal places without trailing zero

I have a division like this: number / 1000.0 Sometimes it gives answers like 96.0000000001, sometimes the division works as expected. I want to limit my number to a maximum of two decimal places and without trailing zeros. If it's 96.5500000001 it should show 96.55. …

Read More