遇到点问题，怎么修改
#include"stdio.h"
enum COLORS {BLACK,BLUE,GREEN,CYAN,RED,MAGENTA,BROWN,LIGHTGRAY,LIGHTGRAY,LIGHTBLUE,LIGHTGREEN,LIGHTCYAN,LIGHTCYAN,LIGHTMAGENTA,YELLOW,WHITE};
void main()
{ enum COLORS a,b,c;
enum COLORS *pa;
int d=-2;
a=RED;
b=WHITE;
printf("\na=%d b=%d c=%d d=%d",a,b);
c=a+b;
if(a>b) pa=&a;
else pa=&b;
*pa=d;
printf("\na=%d b=%d c=%d d=%d",a,b,c,d);
}



--------------------Configuration: helloc - Win32 Debug--------------------
Compiling...
helloc.cpp
D:\VC语言\helloc\helloc.cpp(2) : error C2086: 'LIGHTGRAY' : redefinition
D:\VC语言\helloc\helloc.cpp(2) : error C2086: 'LIGHTCYAN' : redefinition
D:\VC语言\helloc\helloc.cpp(10) : error C2440: '=' : cannot convert from 'int' to 'enum COLORS'
Conversion to enumeration type requires an explicit cast (static_cast, C-style cast or function-style cast)
D:\VC语言\helloc\helloc.cpp(13) : error C2440: '=' : cannot convert from 'int' to 'enum COLORS'
Conversion to enumeration type requires an explicit cast (static_cast, C-style cast or function-style cast)
执行 cl.exe 时出错.

helloc.exe - 1 error(s), 0 warning(s)





[解决办法]
D:\VC语言\helloc\helloc.cpp(2) : error C2086: 'LIGHTGRAY' : redefinition
这个是说变量重定义了，你是不是之前定义过，或者是系统已定义
D:\VC语言\helloc\helloc.cpp(10) : error C2440: '=' : cannot convert from 'int' to 'enum COLORS'
Conversion to enumeration type requires an explicit cast (static_cast, C-style cast or function-style cast)
这个说你定义的变量不能转为int
[解决办法]

C/C++ code

enum Days               // Declare enum type Days{   saturday,            // saturday = 0 by default   sunday = 0,          // sunday = 0 as well   monday,              // monday = 1   tuesday,             // tuesday = 2   wednesday,           // etc.   thursday,   friday} today;                // Variable today has type Daysint  tuesday;           // Error, redefinition of tuesdayenum Days yesterday;    // Legal in C and C++Days tomorrow;          // Legal in C++ onlyyesterday = monday;int i = tuesday;        // Legal; i = 2yesterday = 0;          // Error; no conversionyesterday = (Days)0;    // Legal, but results undefined