c++ 控制台菜单选择程序

[c++]代码库

#include <iostream>

// prototypes
int menu();
void DoTaskOne();
void DoTaskMany(int);

using namespace std;

int main() {
	bool exit = false;
	for (;;) {
		int choice = menu();
		switch (choice) {
		case (1):
			DoTaskOne();
			break;
		case (2):
			DoTaskMany(2);
			break;
		case (3):
			DoTaskMany(3);
			break;
		case (4):
			continue; // redundant!
			break;
		case (5):
			exit = true;
			break;
		default:
			cout << "Please select again! " << endl;
			break;
		} // end switch

		if (exit == true)
			break;
	} // end forever

	return 0;
} // end main()

int menu() {
	int choice;

	cout << " **** Menu **** " << endl << endl;
	cout << "(1) Choice one. " << endl;
	cout << "(2) Choice two. " << endl;
	cout << "(3) Choice three. " << endl;
	cout << "(4) Redisplay menu. " << endl;
	cout << "(5) Quit. " << endl << endl;
	cout << ": ";
	cin >> choice;
	return choice;
}

void DoTaskOne() {
	cout << "Task One! " << endl;
}

void DoTaskMany(int which) {
	if (which == 2)
		cout << "Task Two! " << endl;
	else
		cout << "Task Three! " << endl;
}