【c++】枚举和switch结合

当所有选项都可以用整数常量来标识时可以考虑用switch

#include
enum {
	red,
	orange,
	yellow,
	green,
	blue,
	violet,
	indigo,
};
using namespace std;

int main() {
	cout << "input color code(0-6): ";
	int code;
	cin >> code;
	while (code >= red && code <= indigo) {
		switch (code) 
		{
			case red:
				cout << "red.n";
				break;
			case orange:
				cout << "orange.n";
				break;
			case yellow:
				cout << "yellow.n";
				break;
			case green:
				cout << "green.n";
				break;
			case blue:
				cout << "blue.n";
				break;
			case violet:
				cout << "violet.n";
				break;
			case indigo:
				cout << "indigo.n";
				break;
		}
		cout << "input color code(0-6): ";
		cin >> code;
	}
	cout << "bye.n";
	return 0;
}

input color code(0-6): 3
green.
input color code(0-6): 5
violet.
input color code(0-6): 2
yellow.
input color code(0-6): 8
bye.