定义一个结构体数组，存放10个学生的学号，姓名，三门课的成绩

从键盘输入10个学生的以上内容

输出单门课成绩最高的学生的学号、姓名、以及该门课程的成绩

输出三门课程的平均分数最高的学生的学号、姓名及其平均分-Define an array of structures, storage of 10 students to learn numbers, names, classes are the results from the keyboard 10 students score above the highest output of a single course of study for students, name, and the results of the course average output of three courses of the highest number of school students, name and average