Consider the following example: #include <iostream> struct X { X() = default; X(const X&) = default; X(X&&) = default; X& operator = (const X&) = default; X& ope...

While thinking about this question, I stumbled upon something else I don't understand. Standard says... [class.dtor]/4 If a class has no user-declared destructor, a destructor is implicitl...

I have gone through the following threads: warning: implicit declaration of function Implicit Declaration of Function in C UNIX Possibly my issue is linked. But while they offer the solution th...

Consider the following classes. struct with_copy { with_copy() = default; with_copy(with_copy const&) {} with_copy& operator=(with_copy const&) { return *this; } }; struct foo { w...

While answering this question I compiled the code on Ideone and got this error implicit declaration of function ‘scanf_s’ [-Wimplicit-function-declaration] Isn't stdio.h is the header for scanf...

this: const int a = 5; compiles just fine, whereas const var a = 5; doesn't... while: var a = 5; compiles just as well as this: int a = 5; why?

Can someone please explain to me why the following compiles: int main() { int a = mymethod(0); } int mymethod(int b) { return b; } but this does not: int main() { mymethod(0); } void mymetho...

I am working on an assignment in which we are developing our own RPC client. Upon compiling my server portion, I receive warnings for the following: implicit declaration of function 'read' implici...

Why is it sensible for a language to allow implicit declarations of functions and typeless variables? I get that C is old, but allowing to omit declarations and default to int() (or int in case of ...

below given program is working without including <stdio.h>? Why does this work? int main() { printf("integra"); return 0; }