C与C++ enum区别

在C++11中,标准引入了新的“强类型枚举”,例如：

enum class Color{red, blue, green};

int x = Color::red   //C++98/03中允许,C++11中错误,不允许Color->int转换

Color y = 7           //C++98/03中允许,C++11中错误,不允许int->Color转换

Color z = red      //C++98/03中允许,C++11中错误,red不在作用域内

Color c = Color::red   //C++98/03中错误,C++11中允许

#include<stdio.h>

#include<stdlib.h>
enum color{yellow, red, purple, white, green, black, orange};
int main()
{
enum color c;
for (c = yellow; c < orange; c++)
{
printf("%2d", c);
}
printf("\n");
system("pause");
return 0;

}

运行结果:

#include<iostream>
using namespace std;

enum color{ yellow, red, purple, white, green, black, orange };

int main()
{
enum color c;
for (c = yellow; c < orange; c++)
{
cout << " " << c;
}
cout << endl;
system("pause");
return 0;
}