#!/bin/bash 
 
#colour 函数 
colour () 
{ 
 #格式为背景：前景m，主要实现屏幕颜色显示 
 case $1 in 
  black_white ) #背景为黑色，前景为白色 
   echo -e "\033[40;37m" 
   ;; 
  black_green ) #背景为黑色，前景为绿色 
   echo -e "\033[40;32m" 
   ;; 
  black_cyan ) #背景为黑色，前景为青色 
   echo -e "\033[40;36m" 
   ;; 
  red_yellow ) #背景为红色，前景为黄色 
   echo -e "\033[41;33m" 
   ;; 
  yellow_blue ) #背景为黄色，前景为蓝色 
   echo -e "\033[43;34m" 
   ;; 
 esac 
} 
 
#查询函数 
search() 
{ 
 colour black_white 
 clear 
 echo -e "Please Enter Name >>>\c" 
 read NAME 
 # 如果无记录时 
 if [ ! -f ./record ]; then 
  echo "You mush have some scores before you can search !" 
  sleep 2 
  clear 
  return 
 fi 
 
 # 没有输入名字查询时候 
 if [ -z "$NAME" ]; then 
  echo "You didn't enter a name!" 
  echo -e "Please Enter Name >>>\c" 
 fi 
 echo "你查询的信息是： $NAME" 
 
  
 grep "$NAME" ./record 2> /dev/null 
  
 case "$?" in 
  1 ) echo "Name not in record." 
   ;; 
  2 ) echo "You didn't enter a name to search." 
   sleep 2 
   search # 继续查询 
   ;; 
 esac 
} 
 
#增加记录函数 
add() 
{ 
 clear 
 echo "Enter name and score of a record." 
 echo -e "\c" 
 
 if [ ! -f ./record ]; then 
  touch record 
 fi 
 
 read NEWNAME 
 echo "$NEWNAME" >> ./record 
 
 # 排序后写回文件 
 sort -o ./record ./record 
 echo "添加成功" 
 sleep 2 
} 
 
 
#删除记录函数 
delete() 
{ 
 clear 
 echo -e "Please Enter Name >>> " 
 read NAME 
 
 if [ ! -f ./record ]; then 
  echo "记录为空请先添加！" 
 else 
  cp record record.bak 
 
  grep "$NAME" ./record.bak > /dev/null 
  if [ $? != 0 ]; then 
   echo "此人不存在" 
  else 
   # -v 表示 not 
   grep -v "$NAME" ./record.bak > record 
   echo "删除成功" 
  fi 
  rm -f record.bak 
 fi 
 sleep 1 
} 
 
#显示所有记录 
display() 
{ 
 colour black_white 
 more ./record 
} 
 
#利用vim编辑器编译 
edit() 
{ 
 vim ./record 
} 
 
#屏幕帮助函数 
help() 
{ 
 clear 
 colour black_cyan 
 echo "This is a student's record program by!" 
} 
 
#退出程序 
quit() 
{ 
 clear 
 colour black_white 
 exit 
} 
 
clear 
while : 
do 
 colour red_yellow 
 echo "***********************************************************" 
 echo "*     STUDENT'S RECORD MENU     *" 
 echo "***********************************************************" 
 colour yellow_blue 
 echo "###########################################################" 
 echo "#      1. 查找       #" 
 echo "#      2. 添加       #" 
 echo "#      3. 删除       #" 
 echo "#      4. 显示全部      #" 
 echo "#      5. 编辑记录      #" 
 echo "#      H: Help Screen     #" 
 echo "#      Q: Exit Program     #" 
 echo "###########################################################" 
 
 colour black_green 
 echo -e -n " Please Enter Your Choice [1, 2, 3, 4, 5, H, Q]:\c" 
 read choice 
 
 case $choice in 
  1 ) search 
   ;; 
  2 ) add; clear 
   ;; 
  3 ) delete; clear 
   ;; 
  4 ) display 
   ;; 
  5 ) edit; clear 
   ;; 
  H | h ) help 
   ;; 
  Q | q ) quit 
   ;; 
  * ) echo "Invalid Choice !" 
   sleep 2 
   clear 
   ;; 
 esac 
done