以下选项中不能正确把cl定义成结构体变量的是______。
1) typedef struct
{int red;
Int green;
Int blue;
} COLOR;
COLOR cl;
2) struct color cl
{ int red;
Int green;
Int blue;
};
3) struct color
{ int red;
Int green;
Int blue;
}cl;
4) struct
{int red;
Int green;
Int blue;
}cl;
A.1 B.2 C.3 D.4正确答案B
