Why does calloc require two parameters and malloc just one?

Question

It\'s very bothersome for me to write calloc(1, sizeof(MyStruct)) all the time. I don\'t want to use an idea like wrapping this method and etc. I mean I want to

Answer 1

You shouldn't allocate objects with calloc (or malloc or anything like that). Even though calloc zero-initializes it, the object is still hasn't been constructed as far as C++ is concerned. Use constructors for that:

class MyClass
{
private:
    short m_a;
    int m_b;
    long m_c;
    float m_d;

public:
    MyClass() : m_a(0), m_b(0), m_c(0), m_d(0.0) {}
};

And then instantiate it with new (or on the stack if you can):

MyClass* mc = new MyClass();