題目連結
Problem Description
請定義具有red, orange, yellow, green, blue, violet六種顏色的列舉型別color，根據輸入的顏色名稱，輸出以下六種植物花朵的顏色：Rose(red), Poppies(orange), Sunflower(yellow), Grass(green), Bluebells(blue), Violets(violet)。如果輸入的顏色名稱不在列舉型別color中，例如輸入purple，請輸出I don’t know about the color purple.
Input
輸入資料有多行，每行有一個字串代表顏色名稱，顏色名稱最多30個字元，直到檔案結束為止。
Output
輸出對應顏色的植物名稱，例如：Bluebells are blue. 如果輸入的顏色名稱不在列舉型別color中，例如purple, 請輸出I don’t know about the color purple.
Example Input

#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;
        else
            co = 6
 
;
        switch((color) co){//強制型別轉換為color型別
            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;
}