simple library

run.sh

#!/bin/sh

echo "Ho va ten:"
read name
echo "Lop:?"
read class
echo "So dien thoai:"
read phone_number

echo "Thu vien sach"
echo "------------------------------------------"
echo "ID  TEN SACH  TAC GIA"
echo "------------------------------------------"
input="sach.txt"
while IFS= read -r line
do
  echo "$line"
done < "$input"

echo -e "So phieu $RANDOM       Ngay muon: $(date '+%d/%m/%Y')" >> phieumuon.txt
echo -e " PHIEU MUON SACH " >> phieumuon.txt
echo -e "Ban doc: $name Lop: $class So dien thoai: $phone_numer" >> phieumuon.txt
echo -e "------------------------------------------" >> phieumuon.txt
echo -e "Chi tiet sach muon:" >> phieumuon.txt
echo -e "STT    ID  TEN SACH   TAC GIA    SO LUONG" >> phieumuon.txt
index = 1
sum = 0
do
  echo "Sach can muon:"
  read code;
  echo "So luong:"
  read quantity;
  OUTPUT=$(cat sach.txt | grep code)
  echo -e"$index ${OUTPUT} $quantity" >> phieumuon.txt
  ((index=index+1))
  ((sum=sum+quantity))
done
echo -e "------------------------------------------" >> phieumuon.txt
echo -e "   Tong Cong: $sum" >> phieumuon.txt
echo -e "NV thu thu    Ban doc" >> phieumuon.txt
echo -e "(ky ten)       (ky ten)" >> phieumuon.txt