default
suggest changeIn a switch statement, introduces a label that will be jumped to if the condition’s value is not equal to any of the case labels’ values.
char c = getchar();
bool confirmed;
switch (c) {
case 'y':
confirmed = true;
break;
case 'n':
confirmed = false;
break;
default:
std::cout << "invalid response!\n";
abort();
}
Defines a default constructor, copy constructor, move constructor, destructor, copy assignment operator, or move assignment operator to have its default behaviour.
class Base {
// ...
// we want to be able to delete derived classes through Base*,
// but have the usual behaviour for Base's destructor.
virtual ~Base() = default;
};
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