Enum列舉
主程式
enum宣告
語法
enum 變數名稱{常數1, 常數2, 常數3, 常數4, ...};
列舉型態在內部視為整數，通常集合第一個元素值為0，下一個為1，以此類推。
以下的寫法是錯誤，編譯器編不過。
day1 = 5;
完整程式碼
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enum days_of_week {Sun, Mon, Tue, Wed, Thu, Fri, Sat};
int main() {
days_of_week day1, day2;
day1 = Mon;
day2 = Thu;
int diff = day2 - day1;
cout << "Days between = " << diff << endl;
return 0;
}
Days between = 3
類別與Enum列舉
enum宣告
enum {girl = 0, boy = 1};
變數存放enum
要記得存放enum值的變數
int sex;
指派enum給變數
在類別之外設定列舉
student.sex = student.girl;
完整程式碼
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class Student {
public:
char name[50];
int sex;
enum {girl = 0, boy = 1};
private:
char address[100];
public:
int age;
private:
char father[50];
public:
void setName(const char* name1) {
strcpy(name, name1);
}
void setAge(const int age) {
this->age = age;
}
void print() {
cout << "name: " << name << endl;
cout << "age: " << age << endl;
cout << "sex: ";
if(sex == girl)
cout << "girl" << endl;
else
cout << "boy" <<endl;
}
};
int main() {
Student student;
student.setName("Bill");
student.setAge(20);
student.sex = student.girl;
student.print();
return 0;
}