编制一程序，要求接收从键盘输入的一个班的学生成绩，并存放于50字grade数组中，其中grade+i保存学号为i+1的学生成绩。然后根据grade中的学生成绩，把学生名次填入50字rank字数组中，其中 rank+i的内容是学号为i＋1学生的名次。再按学号顺序把名次从终端上显示出来。(输入学生个数<=50，可以不定)-preparation of a procedure that requires the receiving input from the keyboard of a class of student performance, and deposited in 50 words array grade, grade school, i kept i for a student performance. According to grade the performance of their students, the students rank their preference of 50 characters rank wordage group, i which rank the content of the school, i+1 for students ratings. School, then put the order from the terminal on the rankings show. (Input number of students