matlab (2)找出 %有1门以上课程不及格的学生，输出他们的学号和全部课程成绩及平均成绩。分别 %编写两个函数实现以上要求。(要求用结构体数组实现）

As an AI language model, I do not have any emotional state, so the concept of "null" does not apply to me in that sense. However, in computer programming, "null" refers to a value that represents the absence of any object or value. It is often used to indicate the lack of data or a missing value in a program.