GpaPolicy

abstract def calcGa(grades: Iterable[CourseGrade]): Float

计算平均分

abstract def calcGpa(grades: Iterable[CourseGrade]): Float

计算平均绩点

abstract def precision: Int

平均绩点和平均分的小数点后精确位数,默认为2

abstract def round(gpa: Float): Float

保留小数位

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit