学生成绩核算系统的设计与实现

要求：（1）按班级按课程从文件中读入相应的平时成绩、期中考试成绩和期末考试成绩。

（2）三个成绩对总评成绩的百分比被定义为常数，各占总成绩的30 、30 和40 。

（3）计算每位学生的总评成绩。

（4）计算该班级本课程的总平均成绩。

（5）计算处于优、良、中、及格、不及格的学生人数以及占总人数的百分比。其中100-90为优，89-80为良，79-70为中，69-60为及格，60分以下为不及格。

（6）按要求输出成绩在优、良、中、及格、不及格各区间的学生学号、成绩。

-Student achievement accounting system design and implementation requirements: (a) by class according to the course from the document reads in the corresponding normal results, midterm exam and final exam. (2) three scores on the percentage of total grades are defined as constants, the total score of 30 , 30　and 40 . (3) calculate the total grades for each student. (4) to calculate the class of the course grade point average. (5) calculation is excellent, good, medium, passing, failing students and the percentage of the total number. Which is superior 100-90 ,89-80 ,79-70 is in good ,69-60 to pass 60 points or less failed. (6) according to the required output results in excellent, good, medium, pass, do not pass each section students learn, score.