Java中成绩管理系统（增删查改）

忘是亡心i 2022-07-16 11:17 215阅读 0赞

package com.myhomework;  
  
  
/\*作者：陈天祥  
时间：2016.10.12  
功能：成绩管理系统（增删查改）\*/  
import java.util.Scanner;  
  
  
public class Scoremanage \{  
  
  
public static void main(String\[\] args) \{  
// TODO Auto-generated method stub  
String\[\]\[\] a = \{ \{ "张三", "李四", "王五" \} \};  
int\[\]\[\] b = \{ \{ 123, 456, 789 \} \};  
transfer(a, b);  
  
  
\}  
  
  
// 管理功能  
public static void transfer(String\[\]\[\] a, int\[\]\[\] b) \{  
int select = manu();  
switch (select) \{  
case 1:  
newAdd(a, b);  
transfer(a, b);  
break;  
case 2:  
delete(a, b);  
transfer(a, b);  
break;  
case 3:  
lookup(a, b);  
transfer(a, b);  
break;  
case 4:  
change(a, b);  
transfer(a, b);  
break;  
case 5:  
break;  
case 6:  
System.out.println("退出系统");  
return;  
default:  
System.out.println("no exist this function!program ending!");  
break;  
\}  
transfer(a, b);  
\}  
  
  
// 选择菜单方法  
public static int manu() \{  
System.out  
.println("\*\*\*\*\*\*\*\*\*\*\*\*\*congratulation enter manu function\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out  
.println("1:newAdd\\n2:delete\\n3:lookup\\n4:revise\\n5:lookup average score\\n6:quit\\nplease enter one manu");  
Scanner s1 = new Scanner(System.in);  
int select = s1.nextInt();  
while (select < 1 || select > 6) \{  
System.out.println("不存在该选择，请重新输入");  
select = s1.nextInt();  
\}  
return select;  
\}  
  
  
// 增加学生及成绩方法  
public static void newAdd(String\[\]\[\] a, int\[\]\[\] b) \{  
System.out  
.println("\*\*\*\*\*\*\*\*\*\*congratulation enter newAdd function\*\*\*\*\*\*\*\*\*\*\*");  
Scanner s1 = new Scanner(System.in);  
System.out.println("please increase a student's name");  
String name = s1.nextLine();  
for (int i = 0; i < a\[0\].length; i++) \{  
while (a\[0\]\[i\].equals(name)) \{  
System.out.println("您输入的姓名已存在，请重新输入：");  
name = s1.nextLine();  
i = 0;  
\}  
\}  
System.out.println("please enter the student's score");  
int score = s1.nextInt();  
while (score < 0 || score > 100) \{  
System.out.println("你输入的成绩超出正常范围，请重新输入：");  
score = s1.nextInt();  
\}  
String\[\] newa = a\[0\];  
int\[\] newb = b\[0\];  
a\[0\] = new String\[newa.length + 1\];  
b\[0\] = new int\[newb.length + 1\];  
for (int j = 0; j < a\[0\].length; j++) \{  
if (j == a\[0\].length - 1) \{  
a\[0\]\[j\] = name;  
b\[0\]\[j\] = score;  
\} else \{  
a\[0\]\[j\] = newa\[j\];  
b\[0\]\[j\] = newb\[j\];  
\}  
\}  
  
  
System.out.println("增加成功！");  
  
  
\}  
  
  
// 删除学生及成绩方法  
public static void delete(String a\[\]\[\], int\[\]\[\] b) \{  
System.out  
.println("\*\*\*\*\*\*\*\*\*\*\*\*\*congratulation enter delete function\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");  
Scanner s1 = new Scanner(System.in);  
System.out.println("please enter the student you want to delete");  
System.out.println("请输入您要删除的学生名字");  
String name = s1.nextLine();  
int index = -1;  
for (int i = 0; i < a\[0\].length; i++) \{  
if (name.equals(a\[0\]\[i\])) \{  
index = i;  
\}  
\}  
if (index == -1) \{  
System.out.println("您输入的学生不存在：\\n1:重新输入\\n2退出删除");  
int input = s1.nextInt();  
switch (input) \{  
case 1:  
delete(a, b);  
break;  
case 2:  
System.out.println("结束删除！");  
break;  
default:  
System.out.println("输入无效，删除结束！");  
\}  
\}else\{  
 String\[\] newa=new String\[a\[0\].length\];  
 int\[\] newb=new int\[a\[0\].length\];  
 newa=a\[0\];  
 newb=b\[0\];  
 a\[0\]=new String\[newa.length-1\];  
 b\[0\]=new int\[newb.length-1\];  
 if(index==newa.length)\{  
 for(int i=0;i<newa.length-1;i++)\{  
 a\[0\]\[i\]=newa\[i\];  
 b\[0\]\[i\]=newb\[i\];  
 \}  
 \}  
 else\{  
 for(int j=0;j<newa.length-1;j++)\{  
 if(index>j)\{  
 a\[0\]\[j\]=newa\[j\];  
 b\[0\]\[j\]=newb\[j\];  
 \}  
 if(index<=j)\{  
 a\[0\]\[j\]=newa\[j+1\];  
 b\[0\]\[j\]=newb\[j+1\];  
 \}  
 \}  
 \}  
 System.out.println("删除完成！");  
\}  
\}  
  
  
// 查找方法  
public static void lookup(String\[\]\[\] a, int\[\]\[\] b) \{  
System.out  
.println("\*\*\*\*\*\*\*\*\*\*\*\*\*congratulation enter lookup function\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");  
Scanner s1 = new Scanner(System.in);  
System.out.println("请选择查询方式\\n1查看单个学生成绩：\\n2查看所有学生成绩：");  
int select = s1.nextInt();  
switch (select) \{  
case 1:  
onelookup(a, b);  
break;  
case 2:  
for (int i = 0; i < a\[0\].length; i++) \{  
System.out.println(a\[0\]\[i\] + "的成绩为：" + b\[0\]\[i\]);  
\}  
break;  
default:  
System.out.println("错误，结束查询");  
\}  
  
  
\}  
  
  
// 查找单个学生的成绩  
public static void onelookup(String\[\]\[\] a, int\[\]\[\] b) \{  
System.out.println("请输入您要查询的学生名字");  
Scanner s1 = new Scanner(System.in);  
String name = s1.nextLine();  
int index = -1;  
for (int i = 0; i < a\[0\].length; i++) \{  
if (name.equals(a\[0\]\[i\])) \{  
index = i;  
\}  
\}  
if (index == -1) \{  
System.out.println("您输入的学生不存在：\\n1:重新输入\\n2退出查询");  
int input = s1.nextInt();  
switch (input) \{  
case 1:  
onelookup(a, b);  
break;  
case 2:  
System.out.println("结束查询！");  
break;  
default:  
System.out.println("输入无效，查询结束！");  
\}  
\} else \{  
System.out.println(a\[0\]\[index\] + "的成绩为：" + b\[0\]\[index\]);  
\}  
  
  
\}  
  
  
// 计算下标方法  
public static int count(String\[\]\[\] a, int\[\]\[\] b, String name) \{  
for (int i = 0; i < a\[0\].length; i++) \{  
if (name.equals(a\[0\]\[i\])) \{  
return i;  
\}  
\}  
return -1;  
\}  
  
  
// 修改学生成绩方法  
public static void change(String\[\]\[\] a, int\[\]\[\] b) \{  
System.out  
.println("\*\*\*\*\*\*\*\*\*\*\*\*\*congratulation enter revise function\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println("请输入您要修改的学生名字");  
Scanner s1 = new Scanner(System.in);  
String name = s1.nextLine();  
int index = -1;  
for (int i = 0; i < a\[0\].length; i++) \{  
if (name.equals(a\[0\]\[i\])) \{  
index = i;  
\}  
\}  
if (index == -1) \{  
System.out.println("您输入的学生不存在：\\n1:重新输入\\n2退出修改");  
int input = s1.nextInt();  
switch (input) \{  
case 1:  
change(a, b);  
break;  
case 2:  
System.out.println("结束修改！");  
break;  
default:  
System.out.println("输入无效，修改结束！");  
\}  
\} else \{  
System.out.println("请输入您要修改的分数：");  
int score = s1.nextInt();  
if (score < 0 || score > 100) \{  
System.out.println("您输入的成绩无效!\\n1:重新输入\\n2:结束修改");  
int input = s1.nextInt();  
switch (input) \{  
case 1:  
change(a, b);  
break;  
case 2:  
System.out.println("结束修改！");  
break;  
default:  
System.out.println("输入无效，修改结束！");  
\}  
\} else \{  
  
  
b\[0\]\[index\] = score;  
System.out.println("修改成功");  
\}  
  
  
\}  
\}  
  
  
\}