chengji

说明：  系统功能 1.学生基本情况录入。 2.允许对已经录入的数据进行显示。 3允许进行数据的插入。 4.删除基本数据的相关信息。 5.基于姓名的查询。如：姓张的所有同学。 6.基于各种基本数据的统计计算。如： ①统计每个学生各门功课的平均成绩，并按平均成绩从高到低的次序排名输出每个学生各门功课的综合成绩和平均成绩（名次、学号、姓名、平均成绩、各门功课的考试成绩）。 ②列出90分以上（包括90）、80分以上（包括80）、70分以上（包括70）、60分以上（包括60）、不及格学生清单（学号、姓名、不及格的课程和成绩）。 ③统计并输出各门功课的平均成绩和总平均成绩。
(System function 1. Recording the basic situation of students. 2. To allow entry of data has been displayed. 3. To allow the insertion of data. 4. Basic data to delete the relevant information. 5. Name-based inquiries. Such as: all students Zhang. 6. Basic data on statistical computing. Such as: ① statistics across each student s homework average, and average scores from high to low output of the order of ranking of the subjects each student a comprehensive performance and average performance (ranking, school number, name, grade point average, the subjects examination results). ② listed more than 90 points (including 90), more than 80 points (including 80), more than 70 minutes (including 70), 60 points (including 60), the list of failing students (Student ID, name, do not pass the courses and results). ③ output statistics and the average score of the subjects and the total average score.)