Shell程序---学生管理系统
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实验内容
Ø 作业：学生成绩管理程序
Ø 功能：
对学生成绩进行管理。要求实现数据的基本操作：学院和学生信息以及学生成绩的增加，修改，删除，统计
Ø 构造三个类似数据库的文本文件:
第一个为学院信息文件，包含字段：
学院编号（唯一），学院名称
第二个为学生信息文件，包含字段：
学号（唯一），学生姓名，所在学院编号，说明（休学suspended，退学dropout）
第三个为学生成绩文件，包含字段：
学号（唯一），学生姓名，科目名称，成绩；说明（期考final,补考makeup）
说明：每个记录占一行；分隔符可以自己选定，建议用”,”； 编码规则自己定；文件名自己定
程序功能：要求实现4个功能，每个功能作为一个函数
1.向文件中插入记录
2.显示文件中的每条记录的每个字段值
3.从文件中修改指定学号的记录
4.对学生成绩进行统计（包括每个学生总成绩；每个学科前十名和总成绩前二十名统计）
截图：
#!/bin/bash
#!/bin/awk -f
DBStudentInfoPath="/home/xiaoyaomeng/LinuxHomeWork/DBStudentInfo.txt"
DBCollegeInfoPath="/home/xiaoyaomeng/LinuxHomeWork/DBCollegeInfo.txt"
DBGradeInfoPath="/home/xiaoyaomeng/LinuxHomeWork/DBGradeInfo.txt"
insert_student_info(){
echo "请输入学生的编号(如果文件中已存在则插入失败!): "
read studentNo
export existFlag=false
#判断是否存在编号和输入的一样的学生记录
#cat /home/xiaoyaomeng/LinuxHomeWork/DBStudentInfo.txt | while read line
while read line
do
lineStuNo=${line/,*/}
#echo "数字$lineStuNo,数字2$studentNo"
if [ "$lineStuNo" = "$studentNo" ];
then {
export existFlag=true
break
}
fi
done<$DBStudentInfoPath
#echo "$existFlag"
if [ "$existFlag" = "true" ];
then echo "输入的编号$studentNo已经存在了，插入失败！"
else {
export existFlag=false
echo "请输入该学生的姓名："
read stuName
echo "请输入该学生所在院校编号(必须是学院信息记录文件中有的学院编号):"
read stuCollegeNo
while read line
do
collegeNo=${line/,*/}
if [ "$collegeNo" = "$stuCollegeNo" ];
then {
export existFlag=true
break
}
fi
done<$DBCollegeInfoPath
if [ "$existFlag" = "false" ];
then {
echo "输入的学院编号$stuCollegeNo不存在于学院信息记录文件中($DBCollegeInfoPath)"
}
else {
echo "请输入该学生的说明信息（1.inschool 2.suspended 3.dropout）:"
read sayInfo
case $sayInfo in
1)
echo "$studentNo,$stuName,$stuCollegeNo,inschool" >> $DBStudentInfoPath
echo "插入学生记录成功($studentNo,$stuName,$stuCollegeNo,inschool)"
;;
2)
echo "$studentNo,$stuName,$stuCollegeNo,suspended" >> $DBStudentInfoPath
echo "插入学生记录成功($studentNo,$stuName,$stuCollegeNo,suspended) "
;;
3)
echo "$studentNo,$stuName,$stuCollegeNo,dropout" >> $DBStudentInfoPath
echo "插入学生记录成功($studentNo,$stuName,$stuCollegeNo,dropout) "
;;
*)
echo "说明信息填写有误，插入记录失败"
;;
esac
}
fi
}
fi
}
delete_student_info(){
echo "请输入要删除的学生编号(若学生信息记录文件中不存在，则删除失败): "
read studentNo
export nowline=0;
export delCount=0;
while read line
do
export nowline=$(($nowline + 1))
echo $line":"$nowline
lineStudentNo=${line/,*/}
if [ "$lineStudentNo" = "$studentNo" ];
then {
echo $nowline "是当前行"
sed "$nowline"d $DBStudentInfoPath > $DBStudentInfoPath"_back"
export delCount=$(($delCount + 1))
mv $DBStudentInfoPath"_back" $DBStudentInfoPath
}
fi
done<$DBStudentInfoPath
#mv $DBStudentInfoPath"_back" $DBStudentInfoPath
echo "删除操作处理结束: 被删除的学生编号为$studentNo,删除的学生个数为$delCount"
}
insert_college_info(){
echo "请输入要加入的学院编号(若学院记录文件中存在，则插入失败)："
read collegeNo
export existFlag=false
while read line
do
lineCollegeNo=${line/,*/}
if [ "$lineCollegeNo" = "$collegeNo" ];
then {
export existFlag=true
break
}
fi
done<$DBCollegeInfoPath
if [ "$existFlag" == "true" ];
then {
export existFlag=false
echo "学院记录文件中已经存在此学院编号记录了，插入失败"
}
else {
echo "请输入学院的名称: "
read collegeName
echo "$collegeNo,$collegeName" >> $DBCollegeInfoPath
echo "学院记录插入成功,插入的记录为($collegeNo,$collegeName)"
}
fi
}
delete_college_info(){
echo "请输入要删除的学院编号(若学院记录文件中不存在则删除失败): "
read collegeNo
export nowline=0;
export delCount=0;
while read line
do
export nowline=$(($nowline + 1))
nowCollegeNo=${line/,*/}
if [ "$nowCollegeNo" = "$collegeNo" ];
then {
sed "$nowline"d $DBCollegeInfoPath > $DBCollegeInfoPath"_back"
export delCount=$(($delCount + 1))
mv $DBCollegeInfoPath"_back" $DBCollegeInfoPath
}
fi
done<$DBCollegeInfoPath
#mv $DBCollegeInfoPath"_back" $DBCollegeInfoPath
echo "删除学院记录完成:删除的学院编号为$collegeNo,删除的个数为$delCount"
}
insert_stugrade_info(){
echo "请输入该成绩对应的学生编号(若学生记录文件中不存在该编号则插入失败): "
read studentNo
export existFlag=false
export nowline=0;
export stuName=""
while read line
do
lineStudentNo=${line/,*/}
nowline=$(($nowline + 1))
if [ "$lineStudentNo" = "$studentNo" ];
then {
export existFlag=true
#如果是有这个学生编号的话，把该学生的姓名取出来
export stuName=`echo "$line"|awk -F',' '{print $2}'`
#echo $stuName
break
}
fi
done<$DBStudentInfoPath
if [ "$existFlag" = "false" ];
then {
echo "sorry,学生记录文件中不存在学生编号为$studentNo,插入失败"
}
else {
export existFlag=false
echo "请输入该成绩对应的科目名称: "
read objectName
echo "请输入该成绩的分数(0<=grade<=100): "
read gradeResult
if [ $gradeResult -le 100 ] && [ $gradeResult -ge 0 ];
then {
# echo $gradeResult
echo "请输入该成绩的说明信息(1.期考final 2.补考makeup)"
read sayInfo
case $sayInfo in
1)
echo "$studentNo,$stuName,$objectName,$gradeResult,final" >> $DBGradeInfoPath
echo "插入成功($studentNo,$stuName,$objectName,$gradeResult,final)"
;;
2)
echo "$studentNo,$stuName,$objectName,$gradeResult,makeup" >> $DBGradeInfoPath
echo "插入成功($studentNo,$stuName,$objectName,$gradeResult,makeup)"
;;
*)
echo "输入有误（仅能选1 or 2）,插入失败"
;;
esac
}
else {
echo "输入的成绩不符合要求(0<=grade<=100),插入失败"
}
fi
}
fi
}
delete_stugrade_info(){
echo "输入要删除成绩的学生的编号(存在于学生记录文件): "
read studentNo
export existFlag=false
export delCount=0;
export delLine=0;
while read line
do
lineStudentNo=${line/,*/}
if [ "$lineStudentNo" = "$studentNo" ];
then {
export existFlag=true
break
}
fi
done<$DBStudentInfoPath
if [ "$existFlag" = "true" ];
then {
export existFlag=false
#while read line
# do
# delLine=$(($delLine + 1))
# lineStudentNo=${line/,*/}
# if [ "$lineStudentNo" = "$studentNo" ];
# then {
# delCount=$(($delCount + 1))
# sed "$delLine"d $DBGradeInfoPath > $DBGradeInfoPath"_back"
#mv $DBGradeInfoPath"_back" $DBGradeInfoPath
# }
# fi
# done<$DBGradeInfoPath
sed -i '/$studentNo/d' $DBGradeInfoPath > $DBGradeInfoPath"_back"
mv $DBGradeInfoPath"_back" $DBGradeInfoPath
echo "删除学生成绩成功：被删除学生编号$studentNo"
}
else {
echo "学生记录文件中不存在该学生编号$studentNo,删除失败"
}
fi
}
update_student_info(){
echo "请输入要修改的学生编号(默认仅可修改学生自己的信息)："
read studentNo
stringLine=`grep $studentNo $DBStudentInfoPath`
if [ "$stringLine" != "" ];
then {
stuName=`echo "$stringLine"|awk -F',' '{print $2}'`
stuCollegeNo=`echo "$stringLine"|awk -F',' '{print $3}'`
studentSay=`echo "$stringLine"|awk -F',' '{print $4}'`
echo "要更新的学生信息记录为:$stringLine"
echo "输入要更改的信息(1.姓名 2.学院编号 3.说明信息(1 or 2 or 3)):"
read subCommand
case $subCommand in
1)
echo "请输入该学生的姓名： "
read newStudentName
sed -i '/$studentNo/d' $DBStudentInfoPath > $DBStudentInfoPath"_back"
mv $DBStudentInfoPath"_back" $DBStudentInfoPath
echo "$studentNo,$newStudentName,$stuCollegeNo,$studentSay" >> $DBStudentInfoPath
echo "更新学生记录成功($studentNo,$newStudentName,$stuCollegeNo,$studentSay)"
;;
2)
echo "请输入该学生的学院编号： "
read newCollegeNo
collegeString=`grep $newCollegeNo $DBCollegeInfoPath`
if [ "$collegeString" != "" ];
then {
sed -i '/$studentNo/d' $DBStudentInfoPath > $DBStudentInfoPath"_back"
mv $DBStudentInfoPath"_back" $DBStudentInfoPath
echo "$studentNo,$newStudentName,$newCollegeNo,$studentSay" >> $DBStudentInfoPath
echo "更新学生记录成功($studentNo,$newStudentName,$newCollegeNo,$studentSay)"
}
else {
echo "此学院编号($newCollegeNo)不存在于学院记录文件中，更新失败"
}
fi
;;
3)
echo "请输入该学生的说明信息（1.inschool 2.suspended 3.dropout）:"
read sayInfo
case $sayInfo in
1)
sed -i '/$studentNo/d' $DBStudentInfoPath > $DBStudentInfoPath"_back"
mv $DBStudentInfoPath"_back" $DBStudentInfoPath
echo "$studentNo,$stuName,$stuCollegeNo,inschool" >> $DBStudentInfoPath
echo "更新学生记录成功($studentNo,$stuName,$stuCollegeNo,inschool)"
;;
2)
sed -i '/$studentNo/d' $DBStudentInfoPath > $DBStudentInfoPath"_back"
mv $DBStudentInfoPath"_back" $DBStudentInfoPath
echo "$studentNo,$stuName,$stuCollegeNo,suspended" >> $DBStudentInfoPath
echo "更新学生记录成功($studentNo,$stuName,$stuCollegeNo,suspended)"
;;
3)
sed -i '/$studentNo/d' $DBStudentInfoPath > $DBStudentInfoPath"_back"
mv $DBStudentInfoPath"_back" $DBStudentInfoPath
echo "$studentNo,$stuName,$stuCollegeNo,dropout" >> $DBStudentInfoPath
echo "更新学生记录成功($studentNo,$stuName,$stuCollegeNo,dropout)"
;;
*)
echo "说明信息填写有误，更新记录失败"
;;
esac
;;
*)
echo "输入有误，更新失败!"
;;
esac
}
fi
}
show_student_grade(){
echo "=======================每位学生的总成绩============================== "
awk 'BEGIN{FS=OFS=","}{
namearrays[$1]=$2
arrays[$1]+=$4
}
END{for(studentno in arrays)
print studentno,namearrays[studentno],"总成绩:"arrays[studentno]}' $DBGradeInfoPath
#echo "=======================总成绩的前20名============================= "
#awk 'BEGIN{FS=OFS=","}{
# namearrays[$1]=$2
# arrays[$1]+=$4
#}
#END{
#len=asorti(arrays,sortarrays)
#for(i=0;i<=len;++i)
# print sortarrays[i],"总成绩:"arrays[sortarrays[i]]}' $DBGradeInfoPath
#echo "=======================每个学科的前10名============================= "
#awk 'BEGIN{FS=OFS=","}{
# namearrays[$1]=$2
# objects[$3","$1]=$4
#}END{
# for(object in objects)
# for (name in namearrays)
# print object,name,objects[object","name]
#}' $DBGradeInfoPath
}
show_stu_info(){
echo "=================================================="
echo "学生编号:姓名:学院编号:说明信息";
cat $DBStudentInfoPath;
}
show_college_info(){
echo "=================================================="
echo "学院编号:学院名称";
cat $DBCollegeInfoPath;
}
show_stugrade_info(){
echo "=================================================="
echo "学生编号:学生姓名:科目名称:成绩:说明信息";
cat $DBGradeInfoPath;
}
while true
do
#三个数据文件路径的说明
echo " "
echo "===============几个文件存储路径说明==============="
echo "学生信息记录：/home/xiaoyaomeng/LinuxHomeWork/DBStudentInfo.txt"
echo "学院信息记录：/home/xiaoyaomeng/LinuxHomeWork/DBCollegeInfo.txt"
echo "成绩信息记录：/home/xiaoyaomeng/LinuxHomeWork/DBGradeInfo.txt"
#DBStudentInfoPath = "/home/xiaoyaomeng/LinuxHomeWork/DBStudentInfo.txt"
#DBCollegeInfoPath = "/home/xiaoyaomeng/LinuxHomeWork/DBCollegeInfo.txt"
#读取用户输入的指令
echo "===============欢迎进入学生管理系统==============="
echo "0.退出学生管理系统"
echo "1.增加/删除学生信息记录"
echo "2.增加/删除学院信息记录"
echo "3.增加/删除学生成绩记录"
echo "4.显示所有学生信息记录"
echo "5.显示所有学院信息记录"
echo "6.显示所有学生成绩记录"
echo "7.修改指定学号的记录"
echo "8.显示学生成绩统计结果"
echo "输入command:"
read iCommand
case $iCommand in
0)
echo "已经安全退出系统."
exit 0
;;
1)
echo "1.增加学生信息记录 2.删除学生信息记录"
read subCommand
case $subCommand in
1)
insert_student_info
;;
2)
delete_student_info
;;
*)
echo "输入的命令有误(仅能 1 or 2)"
;;
esac
;;
2)
echo "1.增加学院信息记录 2.删除学院信息记录"
read subCommand
case $subCommand in
1)
insert_college_info
;;
2)
delete_college_info
;;
*)
echo "输入的命令有误(仅能 1 or 2)"
;;
esac ;;
3)
echo "1.增加学生成绩信息记录 2.删除学生成绩信息记录"
read subCommand
case $subCommand in
1)
insert_stugrade_info
;;
2)
delete_stugrade_info
;;
*)
echo "输入的命令有误(仅能 1 or 2)"
;;
esac ;;
4)
show_stu_info
;;
5)
show_college_info
;;
6)
show_stugrade_info
;;
7)
update_student_info
;;
8)
show_student_grade
;;
*)
echo "输入的命令不合法"
;;
esac
done
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http://download.csdn.net/detail/u011133213/6780179