Hi everyone,

In my program I have to set a variable by reading a ini file, the problem is the variable can be either string or double, and I need to assign them to the correct variable type.

To be more precise, my ini file will look like this:

[DATA]
link0 theta=t1
link0 alfa=a1

link1 theta=0.0
link1 alfa=a2

link3 theta=0
link3 alfa=90

The variables "theta" and "alpha" can be defined as a string ("a1", "t1") or as a double ("0.0","90").

if I do something like this:

Qt Code: 
  1. settings.beginGroup("DATA");
  2. const QStringList childKeys = settings.childKeys();
  3.  
  4. foreach (const QString &childKey, childKeys)
  5. {
  6. 	std::cout << settings.value(childKey).type() << std::endl;
  7. 	std::cout << settings.value(childKey).toString().toStdString() << std::endl;
  8. }
  9. settings.endGroup();
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the type() function always return the value=10, which in QVariant enum Type means "string", even when the variable is a number (as in the case of "theta" of link1 =0.0 )

What I need to do is, if the data in the ini File is a number store it in a double variable, if is a string then store it in a string variable. For example, in my example of ini File:
the variable "theta" of link0 should be stored in a string--> std::string a= settings.value(childKey).toString().toStdString()
the variable "theta" of link1 should be stored in a double--> double b= settings.value(childKey).toDouble()

This is:
Qt Code: 
  1. foreach (const QString &childKey, childKeys)
  2. {
  3. 	std::cout << settings.value(childKey).type() << std::endl;
  4.         if (type is number) //<<<<<<<<<<<<<<<<<<<<<< How to detect the correct type here?
  5. 	      double b= settings.value(childKey).toDouble()
  6.         else
  7.               std::string a= settings.value(childKey).toString().toStdString()
  8. }
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I have in mind to treat all the variables as a string and detect if in the string there's any of the characters "a","b","c",...,"x","y","z","A","B",...,"Z", if there is any of them, then saved in a string variable, else is a number. However, that sounds to complicated. Is that possible in a simple way?

I Hope the question is not to confusing .

Thanks,