C++ switch


Example

According to the C++ standard,

The switch statement causes control to be transferred to one of several statements depending on the value of a condition.

The keyword switch is followed by a parenthesized condition and a block, which may contain case labels and an optional default label. When the switch statement is executed, control will be transferred either to a case label with a value matching that of the condition, if any, or to the default label, if any.

The condition must be an expression or a declaration, which has either integer or enumeration type, or a class type with a conversion function to integer or enumeration type.

char c = getchar();
bool confirmed;
switch (c) {
  case 'y':
    confirmed = true;
    break;
  case 'n':
    confirmed = false;
    break;
  default:
    std::cout << "invalid response!\n";
    abort();
}