#include<stdio.h>
enum RGB  (Red,Green,Blue);
int main(){
    int color;
    printf("0~2的值:");
    scanf("%d",&color);
    printf("你选择了");
    switch(color){
        case 0:printf("红色");break;
        case 1:printf("绿色");break;
        case 2:printf("蓝色");break;
    }
    return 0;
}   
/*错误提示  2    6    C:\Users\WP-S10\Desktop\未命名3.cpp    [Error] use of enum 'RGB' without previous declaration
                    2    15    C:\Users\WP-S10\Desktop\未命名3.cpp    [Error] expected ')' before ',' token
                    2    21    C:\Users\WP-S10\Desktop\未命名3.cpp    [Error] invalid type in declaration before ',' token
                    2    26    C:\Users\WP-S10\Desktop\未命名3.cpp    [Error] expected initializer before ')' token*/

enum RGB  {Red,Green,Blue};