exam

#!/bin/bash 

main() {
	clear

	while true 
	do
		cat <<- MENU
			1) select
			2) command
			3) script
			4) makefile
			0) quit
		MENU
		read -p "please input your selection:" section
		echo
		case "$section" in
			1) selection;;
			2) command ;;
			3) script ;;
			4) makefile ;;	 
			0) exit 0 ;;
			*) echo "input error!" ;;
		esac 	
	done
}

selection() {
	paper="p1"
	grep "^#" $paper
	if [ ! -f 1.ans ] 
	then 
		gen_ans 1 20 
	fi
	curr=1;
	while true
	do
		echo 
		sed -n "/^$curr\./,/^$/p" $paper
		youranswer=`grep "^"$curr"\." 1.ans | cut -f2 -d" "`
		read -p "input your answer($youranswer): " answer
		case $answer in
		0)
			main			
			;;
		[1-9]|[1-2][0-9])
			if [ $curr -ge 1 -a $curr -le 20 ]; then
				curr="$answer"
			fi
			;;
		[a-d]|[A-D])
			answer=`echo $answer | tr "[a-z]" "[A-Z]"`
			sed  -i "s/^$curr\. .*/$curr\. $answer/" 1.ans 
			if [ $curr -lt 20 ]; then
				curr=`expr $curr + 1`
			fi
			;;
		-)
			if [ $curr -gt 1 ]; then
				curr=`expr $curr - 1`
			fi
			;;
		"")	
			if [ $curr -lt 20 ]; then
				curr=`expr $curr + 1`
			fi
			;;
		*)	
			echo "input the correct problem number or answer!"
			;;
		esac
	done	
}

command() {
	paper="p2"
	grep "^#" $paper
	curr=1;
	while true
	do
		echo 
		sed -n "/^$curr\./,/^$/p" $paper
		echo -n "ANS: "
		if [ -f "$curr.cmd" ]
		then
			cat $curr.cmd 2> /dev/null
		else
			echo
		fi
		echo 
		read -rp "input your answer: " answer
		case $answer in
		0)
			main			
			;;
		[1-9]|1[0-5])
			curr="$answer"
			;;
		-)
			if [ $curr -gt 1 ]; then
				curr=`expr $curr - 1`
			fi
			;;
		"")	
			if [ $curr -lt 20 ]; then
				curr=`expr $curr + 1`
			fi
			;;
		*)	
			echo "$answer"  > $curr.cmd
			if [ $curr -lt 15 ]; then
				curr=`expr $curr + 1`
			fi
			;;
		esac
	done	
}

script() {
	paper="p3"
	grep "^#" $paper
	curr=1;
	while true
	do
		echo
		sed -n "/^$curr\./,/^$/p" $paper
		read -p "input your selection(e to edit the file): " answer
		case $answer in
		0)
			main			
			;;
		[1-2])
			curr="$answer"
			;;
		-)
			if [ $curr -gt 1 ]; then
				curr=`expr $curr - 1`
			fi
			;;
		e)
			vi $curr.sh
			;;
		"")	
			if [ $curr -lt 2 ]; then
				curr=`expr $curr + 1`
			fi
			;;
		*)	
			echo "input the correct number"
			;;
		esac
	done	
}

makefile() {
	paper="p4"
	cat $paper
	read -p "press 0 to quit or any other key to start edit the makefile...: " choice
	if [ $choice = "0" ]; then
		main
	else
		vi makefile
		main
	fi
}

gen_ans() {
	> $1.ans
	cur=1
	while [ $cur -le $2 ]
	do
		echo "$cur. " >> $1.ans
		cur=`expr $cur + 1`
	done
}

main

看不出来是哪来的题目

原来是p1，p2, p3, p4