sdut 1959 简单枚举类型——植物与颜色

题目链接
Problem Description
请定义具有red, orange, yellow, green, blue, violet六种颜色的枚举类型color，根据输入的颜色名称，输出以下六种植物花朵的颜色：Rose(red), Poppies(orange), Sunflower(yellow), Grass(green), Bluebells(blue), Violets(violet)。如果输入的颜色名称不在枚举类型color中，例如输入purple，请输出I don’t know about the color purple.
Input
输入数据有多行，每行有一个字符串代表颜色名称，颜色名称最多30个字符，直到文件结束为止。
Output
输出对应颜色的植物名称，例如：Bluebells are blue. 如果输入的颜色名称不在枚举类型color中，例如purple, 请输出I don’t know about the color purple.
Example Input
blue
yellow
purple
Example Output
Bluebells are blue.
Sunflower are yellow.
I don’t know about the color purple.
使用枚举类型的时候要用强制类型转换

#include<iostream>
using namespace std;
typedef enum color{
    red, orange, yellow, green, blue, violet
}color;
int main(){
    string s;while(cin>>s){
    int co;if(s=="red")co = 0;else if(s=="orange")co = 1;else if(s=="yellow")co = 2;else if(s=="green")co = 3;else if(s=="blue")co = 4;else if(s=="violet")co = 5;elseco = 6;switch((color) co){
    //强制类型转换为color类型case 0:cout<<"Rose are red."<<endl;break;case 1:cout<<"Poppies are orange."<<endl;break;case 2:cout<<"Sunflower are yellow."<<endl;break;case 3:cout<<"Grass are green."<<endl;break;case 4:cout<<"Bluebells are blue."<<endl;break;case 5:cout<<"Violets are violet."<<endl;break;default:cout<<"I don't know about the color "<<s<<"."<<endl;break;}}return 0;
}