This code has 3 holes: First hole: int numEntries. Later you do: ++numEntries; You increment unspecified value. Not sure if it’s UB, but still bad. Second and third hole: And numEntries has unspecified value (first hole). You use it to initialize length and size – that is Undefined Behaviour. But let’s assume it is just some big number – you allocate memory … Read more
It means something like this: Then you add to the vector as you read lines: Remember to delete all of the Movie* objects once you are done with the vector.
I’m making a project for one of my classes and I’m pretty sure I’m almost done with the project. Basically I have to input 2 people’s tickets and I have to find the maximum and minimum price. I need to overload the * and / operators to fix that issue for the project. Also, the friend declaration … Read more
There’s no mystery here, the linker is telling you that you haven’t defined the missing symbols, and you haven’t. Similarity::Similarity() or Similarity::~Similarity() are just missing and you have defined the others incorrectly, not etc. etc. The second one is a function called readData, only the first is the readData method of the Similarity class. To be clear about … Read more
When I try to build a program using Eclipse CDT, I get the following: /mingw/lib/libmingw32.a(main.o):main.c:(.text+0x106): undefined reference to `WinMain@16 Why is that? And, how can I solve this issue?
For what it’s worth, here’s another way to extract tokens from an input string, relying only on standard library facilities. It’s an example of the power and elegance behind the design of the STL. Instead of copying the extracted tokens to an output stream, one could insert them into a container, using the same generic copy algorithm. … Read more
I need the simplest possible answer to this. I have looked up in various sites for the answer. If the inputs to a programme is such that the output is 10, will command return 0 force the programme to return the value 0 instead of 10? I have written simple C programmes on Borland IDE … Read more
What the inFile >> S does is take in the file stream, which is the data in you file, and uses a space delimiter (breaks it up by whitespace) and puts the contents in the variable S. For example: If we had a file that had the follow contents and we used inFile >> S with our file: we … Read more
From Wikipedia’s Virtual function … In object-oriented programming, in languages such as C++, and Object Pascal, a virtual function or virtual method is an inheritable and overridable function or method for which dynamic dispatch is facilitated. This concept is an important part of the (runtime) polymorphism portion of object-oriented programming (OOP). In short, a virtual function defines … Read more
C and C++ can run on many different architectures, and machine types. Consequently, they can have different representations of numbers: Two’s complement, and Ones’ complement being the most common. In general you should not rely on a particular representation in your program. For unsigned integer types (size_t being one of those), the C standard (and the … Read more