#!/bin/bash  #colour 函數 colour () {  #格式為背景：前景m，主要實現屏幕顏色顯示  case $1 in   black_white ) #背景為黑色，前景為白色    echo -e "/033[40;37m"    ;;   black_green ) #背景為黑色，前景為綠色    echo -e "/033[40;32m"    ;;   black_cyan ) #背景為黑色，前景為青色    echo -e "/033[40;36m"    ;;   red_yellow ) #背景為紅色，前景為黃色    echo -e "/033[41;33m"    ;;   yellow_blue ) #背景為黃色，前景為藍色    echo -e "/033[43;34m"    ;;  esac }  #查詢函數 search() {  colour black_white  clear  echo -e "Please Enter Name >>>/c"  read NAME  # 如果無記錄時  if [ ! -f ./record ]; then   echo "You mush have some scores before you can search !"   sleep 2   clear   return  fi   # 沒有輸入名字查詢時候  if [ -z "$NAME" ]; then   echo "You didn't enter a name!"   echo -e "Please Enter Name >>>/c"  fi  echo "你查詢的信息是： $NAME"     grep "$NAME" ./record 2> /dev/null    case "$?" in   1 ) echo "Name not in record."    ;;   2 ) echo "You didn't enter a name to search."    sleep 2    search # 繼續查詢    ;;  esac }  #增加記錄函數 add() {  clear  echo "Enter name and score of a record."  echo -e "/c"   if [ ! -f ./record ]; then   touch record  fi   read NEWNAME  echo "$NEWNAME" >> ./record   # 排序后寫回文件  sort -o ./record ./record  echo "添加成功"  sleep 2 }   #刪除記錄函數 delete() {  clear  echo -e "Please Enter Name >>> "  read NAME   if [ ! -f ./record ]; then   echo "記錄為空請先添加！"  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 "刪除成功"   fi   rm -f record.bak  fi  sleep 1 }  #顯示所有記錄 display() {  colour black_white  more ./record }  #利用vim編輯器編譯 edit() {  vim ./record }  #屏幕幫助函數 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. 刪除       #"  echo "#      4. 顯示全部      #"  echo "#      5. 編輯記錄      #"  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