You can call clear, and that will destroy all the objects, but that will not free the memory. Looping through the individual elements will not help either (what action would you even propose to take on the objects?) What you can do is this: That will create an empty vector with no memory allocated and … Read more
You don’t want to push_front on a vector ever. Adding an element to the front means moving every single other element in the vector one element back: O(n) copying. Terrible performance.
Or, if the string already exists: Edit: I’m still not completely sure I understand the question. But if it’s something like what JoshG is suggesting, that you want up to length characters, or until a null terminator, whichever comes first, then you can use this:
From the update 2 and after narrowing down the problem scope, we can easily find that there is a brace missing at the end of the function addWord. The compiler will never explicitly identify such a syntax error. instead, it will assume that the missing function definition located in some other object file. The linker will … Read more
isnumber() may be an Apple-specific C++ method (I don’t have a Mac on hand to check). You can see it in the Apple dev guide: The isnumber() function behaves similarly to isdigit(), but may recognize additional characters, depending on the current locale setting. Besides, isnumber() is not declared on Linux: I use g++ 6.1.1 on Linux 4.7.2 and get the error: I … Read more
Some random situations where conversion functions are used and not used follow. First, note that conversion functions are never used to convert to the same class type or to a base class type. Conversion during argument passing Conversion during argument passing will use the rules for copy initialization. These rules just consider any conversion function, … Read more
You can check like this: Furthermore, you can continue to get input until you get an int via: EDIT: To address the comment below regarding input like 10abc, one could modify the loop to accept a string as an input. Then check the string for any character not a number and handle that situation accordingly. … Read more
An 8-bit bitmap requires a color table. Since you want grayscale, you have to set up the color table to have 256 levels of gray. You’ve set the first one to black, which is correct, but you haven’t set the rest. BITMAPINFO is actually a variably sized structure. The bmiColors field is just a placeholder … Read more
You don’t need an array of const objects. A pointer-to-const can point to either const or non-const objects; you can create a dynamic array and initialise a Chunk structure from it like this:
I’m pretty new to C++ and this site so there are bound to be errors. When I try to compile my code I get errors like error: missing template argument before ‘b’. I’ve been searching the world for answers for hours and it has led me here. My assignment is to implement a templated class Collection … Read more