Jul 7, 2014 · In C++, as noted above, we don't need new to create an object. Rather, new means "allocate memory on the heap, construct the object in that memory, and return a pointer to it, which I'll free with delete when I'm done".

An array name, cards in your code, contains the address of the first element of the array. Such addresses are allocated at run time and you cannot change them. Hence the compiler complaining about cards being not an l-value. But you can definitely specify what those addresses can hold by using a pointer like below:

Jan 6, 2011 · It's not good to make array of objects. Much better is to make an array of pointers to objects. employee ** array; array = new employee[array_count]; // create an array of object pointers for(int i=0; i<array_count; i++) { array[i] = new employee( . . . your constructor parameters . . .); OR array[i] = *(anExistingEmployeeObject); } Please, don ...

Aug 19, 2021 · Just note that this will default-construct the array elements first, and then construct temporary objects to overwrite the array elements. If you want to avoid the temporaries, but still want a fixed array of objects stored consecutively, you can use placement-new to construct the array members directly using your non-default constructor, eg:

Feb 13, 2022 · Don't try to learn C++ by analogy with Java- C++ and Java are VERY different languages, even if they have some syntax in common. Learning C++ by analogy from Java is an effective way of becoming a terrible C++ programmer. (Similarly, learning Java by analogy from C++ is an effective way to become a terrible Java programmer). –

Dec 8, 2016 · I would think this is just some beginners thing where there's a syntax that actually works when attempting to dynamically allocate an array of things that have internal dynamic allocation. (Also, style critiques appreciated, since it's been a while since I did C++.) Update for future viewers: All of the answers below are really helpful. Martin ...

Oct 22, 2015 · At first, the returned array contains uninitialized memory of the correct size and alignment. Objects can be constructed in this array using placement new as you can see in the body of that for loop. Remember that new invokes the constructor, so for our code to be correct, we have to manually destruct each object in the array (with ~Car()). Notes:

Oct 25, 2011 · The best practice for that would be to create an array of smart pointers - preferably either one of the Boost or C++11 versions - to the base class. Making it a pointer array eliminates the risk of "slicing" your objects when you access them. Using smart pointers reduces the …

Dec 1, 2013 · works only if the Stock class has a zero argument constructor if it does not have any zero argument constructor you cannot create an array of dynamic objects dynamically. you can as said create a array of dynamic object with a static array like. Stock stockArrayPointer[4]={Stock(args),Stock (args)}; but the syntax

Apr 15, 2011 · Many problems:. Missing semicolon on the closing brace of the class, as maverik noted; Use of string without using namespace std; or using std::string; (or #include <string> for that matter)