输入两个点的坐标，可求出它们之间的距离，并判断它们是否在第一象限-Input the coordinates of two points can be calculated the distance between them and determine whether they are in the first quadrant

MFC制作的学生链表，将学生信息读入读出。这是我们数据结构的首堂实验课内容。-MFC list produced by the students will read the students to read out information. This is our data structure the contents of the first experimental class together.