有10个学生，每个学生的数据包括学号、姓名、3门课的成绩，从键盘输入10个学生数据，求出每个学生3门课的平均成绩，并输出最高分的学生的数据（包括学号、姓名、3门课的成绩、平均成绩）。

输入4个整数，按由小到大的顺序输出，使用指针进行处理。

请说明以下程序段存在的问题，并改正。

int a,*p

scanf(“ d”,p)

通过计算机并口向数模转换器发送数据,实现D/A转换。

将两台计算机的COM口相连，一个作为接收端，另一个作为发送端，编程实现两台计算机之间的简单通信。

-There are 10 students, each student' s data, including Student ID, name, 3 course results, 10 students from the keyboard input data, calculate each student' s grade point average three classes, and the output data from the highest score of the students (including Student ID, name, three classes of performance, average results). Enter four integers, according to the order of small to large output, the use of pointers for processing. Please indicate the following program segment problems, and correct. int a,* p　scanf ( "　 d" , p)　through the computer parallel port to send data to the DAC to achieve D/A converter. The COM port will be connected to two computers, one as a receiver, the other as a transmitter, programming a simple communication between two computers.