When cin gets input it can’t use, it sets failbit: When cin‘s failbit is set, use cin.clear() to reset the state of the stream, then cin.ignore() to expunge the remaining input, and then request that the user re-input. The stream will misbehave so long as the failure state is set and the stream contains bad input.
The LinkedList destructor has a couple of problems. First, it’s pointless to set m_size to 0 and a to NULL since they will both go away at the end of the destructor. More important, the code will attempt to dereference a null pointer when the list is empty: Here’s a cleaner way to write it:
It looks like immediately after you draw the circle, you go into the main glut loop, where you’ve set the Draw() function to draw every time through the loop. So it’s probably drawing the circle, then erasing it immediately and drawing the square. You should probably either make DrawCircle() your glutDisplayFunc(), or call DrawCircle() from Draw().
Hi I have compiled your code, with the .txt it runs well, without gives the strage numbers that you see. So probably you are opening a file that does not exists, or can not be red. This snippet checks if the file exists, raises an error if not, and uses a vector(more suitable in c++)
Here is a simple method of creating a hierarchical tree (n-ary with no special properties), using STL containers. It isn’t pre-built, but it is dead simple, and takes advantage of some STL properties. To create your own searching, you’d have to implement your own algorithms, but that should be fairly painless.
I understand that cin.eof() tests the stream format. And while giving input, end of character is not reached when there is wrong in the input. I tested this on my MSV C++ 2010 and am not understanding the strange results. No matter what I give the input, I am getting Format Error message that is … Read more
Try this:
Both have the same complexity: Constant. From the N4431 working draft, §21.4.4 size_type size() const noexcept; Returns: A count of the number of char-like objects currently in the string. Complexity: Constant time. And size_type length() const noexcept; Returns: size(). […] iterates through all the characters and counts the length […] That’s C strings you’re thinking … Read more
<graphics.h> is very old library. It’s better to use something that is new Here are some 2D libraries (platform independent) for C/C++ SDL GTK+ Qt Also there is a free very powerful 3D open source graphics library for C++ OGRE