使用c语言写的学生信息管理系统

package 课程设计; import java.io.*; import java.util.Arrays; import java.util.Scanner; import java.lang.*; public class Student implements Serializable { private static int j; private String num=null; private String name=null; private String collage=null; private String aclass=null; private String sex=null; private int eng; private int math; private int yuwen; private int sum = 0; private int size; Scanner astudent = new Scanner(System.in); public Student(String num, String name, String collage, String aclass, String sex, int eng, int math, int yuwen, int size) { this.num = num; this.name = name; this.collage = collage; this.aclass = aclass; this.sex = sex; this.eng = eng; this.math = math; this.yuwen = yuwen; this.size = size; sum(); } public Student() { } public String getnum() { return num; } public String getname() { return name; } public String getcollage() { return collage; } public String getaclass() { return aclass; } public String getsex() { return sex; } public int geteng() { return eng; } public int getmath() { return math; } public int getyuwen() { return yuwen; } public int getsum() { return sum; } public int getsize() { return size = astudent.nextInt(); } public void setnum(String num) { this.num = num; } public void setname(String name) { this.name = name; } public void setcollage(String collage) { this.collage = collage; } public void setaclass(String aclass) { this.aclass = aclass; } public void setsex(String sex) { this.sex = sex; } public void seteng(int eng) { this.eng = eng; sum(); } public void setmath(int math) { this.math = math; sum(); } public void setyuwen(int yuwen) { this.yuwen = yuwen; sum(); } public void setsum(int sum) { this.sum = sum; } public void setsize(int size) { this.size = size; } public void sum() { this.sum = eng + math + yuwen; } public String toString() { return "Student num=" + getnum() + ", name=" + getname() + ", collage=" + getcollage() + ", aclass=" + getaclass() + ", sex=" + getsex() + ", eng=" + geteng() + ", math=" + getmath() + ", yuwen=" + getyuwen() + ", sum=" + getsum(); } /* * 建立学生信息管理的菜单 */ public void Menu() { System.out.println("*************************"); System.out.println("* 1.录入信息 *"); System.out.println("*************************"); System.out.println("* 2.修改信息 *"); System.out.println("*************************"); System.out.println("* 3.删除信息 *"); System.out.println("*************************"); System.out.println("* 4.显示信息 *"); System.out.println("*************************"); System.out.println("* 5.查询信息 *"); System.out.println("*************************"); System.out.println("* 6.信息排序 *"); System.out.println("*************************"); System.out.println("* 7.信息统计 *"); System.out.println("*************************"); System.out.println("* 8.数据存储 *"); System.out.println("*************************"); System.out.println("* 9.数据读取 *"); System.out.println("*************************"); System.out.println("* 10.退出程 *"); System.out.println("*************************"); System.out.println("* 请选择功能： *"); System.out.println("*************************"); } /* * 录入学生信息 */ public void I(Student[] student, int d) { System.out.println("*录入信息 ： *"); for (int i = 0; i < d; i++) { student[i].Input(); } } public void Input() { System.out.println("********"); System.out.println("*学号: *"); System.out.println("********"); num = astudent.nextLine(); while (num == null) { System.out.println("*****************"); System.out.println("*数据错误请重新输入学号:*"); System.out.println("*****************"); num = astudent.nextLine(); } System.out.println("********"); System.out.println("*姓名: *"); System.out.println("********"); name = astudent.nextLine(); while (name == null) { System.out.println("*****************"); System.out.println("*数据错误请重新输入姓名:*"); System.out.println("*****************"); name = astudent.nextLine(); } System.out.println("********"); System.out.println("*学院: *"); System.out.println("********"); collage = astudent.nextLine(); while (collage == null) { System.out.println("*****************"); System.out.println("*数据错误请重新输入学院:*"); System.out.println("*****************"); collage = astudent.nextLine(); } System.out.println("********"); System.out.println("*班级: *"); System.out.println("********"); aclass = astudent.nextLine(); while (aclass == null) { System.out.println("*****************"); System.out.println("*数据错误请重新输入班级:*"); System.out.println("*****************"); aclass = astudent.nextLine(); } System.out.println("********"); System.out.println("*性别: *"); System.out.println("********"); sex = astudent.nextLine(); while (sex ==null) { System.out.println("*****************"); System.out.println("*数据错误请重新输入性别:*"); System.out.println("*****************"); sex = astudent.nextLine(); } System.out.println("********"); System.out.println("*英语成绩:*"); System.out.println("********"); eng = astudent.nextInt(); while (eng < 0 || eng > 150) { System.out.println("********************"); System.out.println("*数据错误请重新输入英语成绩:*"); System.out.println("********************"); eng = astudent.nextInt(); } System.out.println("********"); System.out.println("*数学成绩:*"); System.out.println("********"); math = astudent.nextInt(); while (math < 0 || math > 150) { System.out.println("********************"); System.out.println("*数据错误请重新输入数学成绩:*"); System.out.println("********************"); math = astudent.nextInt(); } System.out.println("********"); System.out.println("*语文成绩:*"); System.out.println("********"); yuwen = astudent.nextInt(); while (yuwen < 0 || yuwen > 150) { System.out.println("********************"); System.out.println("*数据错误请重新输入语文成绩:*"); System.out.println("********************"); yuwen = astudent.nextInt(); } sum(); } /* * 修改学生信息 菜单 */ public void X(Student[] student, int d) { Scanner sc = new Scanner(System.in); System.out.println("*修改信息： *"); System.out.println("*输入需修改的学生的位序：*"); int anum = sc.nextInt(); if (anum < 0 || anum > d) System.out.println("程序出错："); else { System.out.println("******************"); System.out.println("* 选择需修改的项目： *"); System.out.println("******************"); System.out.println("* 1.修改学号 *"); System.out.println("******************"); System.out.println("* 2.修改姓名 *"); System.out.println("******************"); System.out.println("* 3.修改学院 *"); System.out.println("******************"); System.out.println("* 4.修改班级 *"); System.out.println("******************"); System.out.println("* 5.修改性别 *"); System.out.println("******************"); System.out.println("* 6.修改英语成绩 *"); System.out.