Incomplete type is not allowed: stringstream?

Why does this line give the error Error: incomplete type is not allowed? stringstream ss; ...

Incomplete type is not allowed: stringstream?

Why does this line give the error Error: incomplete type is not allowed? stringstream ss; ...

Clear Transparent Background for QWidget?

I have a widget as on overlay for another widget. The transparency works fine, as long as I don't clear the backgrou...

error: request for member '..' in '..' which is of non-class type?

I have a class with two constructors, one that takes no arguments and one that takes one argument. Creating objects...

error: request for member '..' in '..' which is of non-class type?

I have a class with two constructors, one that takes no arguments and one that takes one argument. Creating objects...

Reverse the effect of a spherical image?

I want to reverse the effect of a spherical image such as this one: Provided the image, I would like to be able t...

calculate orientation when rotating around circle?

I've recently run into a mild problem when trying to program a class that holds multiple sprites with SFML. I have ...

Read-only variable is not assignable?

Yes this is for homework, my code is asking me to enter an array that is terminated upon typing in the number 0 or w...

Pedantic gcc warning: type qualifiers on function return type?

When I compiled my C++ code with GCC 4.3 for the first time, (after having compiled it successfully with no warnings...

What does “Cannot overload functions distinguished by return type alone” mean??

I have this code: In the header: ... int32_t round(float v); ... and in the source ... int32_t round(float v) {...

Function cannot be referenced as it is a deleted function?

Hello I am learning C++ from a book and am on a exercise question below Write a function that takes and returns an ...

What does CV_8UC3 and the other types stand for in OpenCV??

I was surprised when I couldn't find anything in OpenCV documentation describing - with words - what the various typ...

Error: free(): invalid next size (fast):?

What is this strange error I'm getting? I'm compiling C++ using g++ on Ubuntu 10.10. It pops up randomly when I run ...

Error: Jump to case label?

I wrote a program which involves use of switch statements... However on compilation it shows: Error: Jump to cas...

Error: Jump to case label?

I wrote a program which involves use of switch statements... However on compilation it shows: Error: Jump to cas...