The syntaxes and are exactly the same as when in a function parameter list (I left out the optional names). Additionally, an array name decays to a pointer to the first element when passed to a function (and not passed by reference) so both int firstarray[3] and int secondarray[5] decay to int*s. It also happens … Read more
I’m currently working on a card game, and I’m having trouble with some initialization code: The trouble is that my compiler’s telling me that cards++ is not an l-value. I’ve read up on the whole pointer-array equivalence thing, and I thought I understood it, but alas, I can’t get it to work. My understanding is … Read more
What you need is a way to look up some data given a key. With the key being an unsigned int, this gives you several possibilities. Of course, you could use a std::map: However, there’s other possibilities as well. For example, it’s quite likely that a hash map would be even faster than a binary … Read more
You are getting Floating point exception because Number % i, when i is 0: Just start the loop at i = 2. Since i = 1 in Number % i it always be equal to zero, since Number is a int.
CString is neither a C nor a C++ type. It appears to be a Microsoft invention that is essentially an alternative to std::string: CString objects can grow as a result of concatenation operations. CString objects follow “value semantics.” Think of a CString object as an actual string, not as a pointer to a string. You can freely substitute CString objects for const char* and LPCTSTR function arguments. A conversion … Read more
You need to use extern “C” in C++ when declaring a function that was implemented/compiled in C. The use of extern “C” tells the compiler/linker to use the C naming and calling conventions, instead of the C++ name mangling and C++ calling conventions that would be used otherwise. For functions provided by other libraries, you will almost never need … Read more
It’s a really terrible name for an incredibly powerful concept, and perhaps one of the number 1 things that C++ developers miss when they switch to other languages. There has been a bit of a movement to try to rename this concept as Scope-Bound Resource Management, though it doesn’t seem to have caught on just yet. … Read more
You can use std::find from <algorithm>: This returns a bool (true if present, false otherwise). With your example:
showInventory(player); is passing a type as parameter. That’s illegal, you need to pass an object. For example, something like: I’m guessing you have something like this: which is awful. First, don’t name the object the same as your type. Second, in order for the object to be visible inside the function, you’ll need to pass it … Read more
You can get a specific character from a string simply by indexing it. For example, the fifth character of str is str[4] (off by one since the first character is str[0]). Keep in mind you’ll run into problems if the string is shorter than your index thinks it is. c_str(), as you have in your comments, gives you a char* representation (the … Read more