若有Const PI=3.14159，PI称为（）

A.const double PI = 3.14159;

B.double const PI = 3.14159;

C.double PI = 3.14159;

D.double pi; pi=3.14159;

A.True

B.100

C.Const PI = 3.14159

D.2019-10-16

A.单精度常量PI，代表3.14159

B.双精度常量PI，代表3.14159

C.单精度变量PI，其值为3.14159

D.双精度变量PI，其值为3.14159

A.Const pi = 3.14!

B.i = 4.6

C.pi = 3.14159

D.If i Then s = pi * i * i Else s = 1

A.double a=2*PI;

B.PI=3.14159;

C.cin＞＞PI;

D.cout＜＜PI;

A.Const pi = 3.14!

B.i = 4.6

C.pi = 3.14159

D.If i Then s = pi * i * i Else s = 1

A.define PI 3.14159

B.#define P(a,b)=strcpy(a,b)

C.#define stdio.h

D.#define PI 3.14159

A.define PI 3.14159

B.#define P(a,b)=strcpy(a,b)

C.#define stdio.h

D.#define PI 3.14159

A.define PI 3.14159

B.#define P(a,b)=strcpy(a,b)

C.#define stdio.h

D.#define PI 3.14159