Question

I want to new a StringArray as follow:

class Test
{
public: 
    QString* str[];
    Test() {
        str = new QString[];
    }
};

is there some wrong: about str = new QString[] ?

Answer 1

You didn’t specify a size for the array.

Note that there is special syntax for the delete operator when deleting an array as well:

QString* strings;
strings = new QString[10];
delete[] strings;

If you want a dynamic array, consider using STL vector (std::vector<QString> in this case) instead.