有两个.c源文件，第一个用来求具体的日期是该年的第几天，要求判断是闰年还是平年，第二个是用来对学生的成绩排序的。-There are two .c source files, the first to seek a specific date is the first day of the year, requiring judgment is a leap year or leap year, and the second is used to sort of student achievement.