有5个学生，每个学生的数据结果包括学号、姓名、年龄、C++成绩、数学成绩和英语成绩、总平均分，从键盘输入5个学生的学号、姓名、3门课的成绩，计算3门课的总平均分，最后将5个学生的数据输出。要求各个功能用函数来实现：输入学生数据的函数、计算总平均分的函数学生数据输出的函数-Five students, each student' s data include the results of Student ID, name, age, C++ achievement, math and English scores, the overall average score of five students from the keyboard input student number, name, 3 course, Calculate the overall average score of 3 course, the data output of the last five students. Require each function to function: a function of the input student data to calculate the overall average score, a function of student data output function