我正在努力学习抨击。我正在尝试运行./test testcase 测试用例中的文件在下一行有参数9 11 22 13,32 35 32 16，依此类推 我的程序需要4个参数。现在如果testcase有一行参数，即3 5 6 7它可以正常工作，但是当有超过2时它无法正常运行程序。我知道我需要一个while循环来读取文件的每一行，但我被困在这里。如果有人能帮助我，我将不胜感激。先感谢您。 我之前在这里问过这个问题，我不知道每个人是否太忙或者不知道怎么做。再次感谢
your_path=../test/test
test_path=../../public/test
file_input="$1"
#while read -r line; do
#done < "$file_input"
# Read contents in the file
contents=$(< "$file_input")
# Display output of the test file
"$test_path" $contents > correctanswer 2>&1
# Display output of your file
"$your_path" $contents > youranswer 2>&1
diff the solutions
diff correctanswer youranswer > /dev/null 2>&1
if [ $? -eq 0 ]
then
echo "The two outputs were exactly the same "
else
echo "$divider"
echo "The two outputs were different "
diff youranswer correctanswer
echo "Do you wish to see the ouputs side-by-side?"
select yn in "Yes" "No"; do
case $yn in
Yes ) echo "LEFT: Your Output RIGHT: Solution Output"
sleep 1
vimdiff youranswer correctanswer; break;;
No ) exit;;
esac
done
fi
答案 0 :(得分：1)
我通常会使用类似于以下的构造（适用于您的示例）。请注意，您需要进行的唯一更改是关闭周期的cat $file | (while read l; do然后done)。循环体正好是您的代码，但contents替换为l（行读取）。围绕循环的括号实际上启动了shell的另一个实例，其中while执行并且stdin设置为从cat传送。
your_path=../test/test
test_path=../../public/test
file_input="$1"
exec 3< $file_input
while read -u 3 l; do
# do your per-test diffs and outputs here
# variable $l will contain one line of $file_input
# Display output of the test file
"$test_path" $l > correctanswer 2>&1
# Display output of your file
"$your_path" $l > youranswer 2>&1
# diff the solutions
diff correctanswer youranswer > /dev/null 2>&1
if [ $? -eq 0 ]
then
echo "The two outputs were exactly the same "
else
echo "$divider"
echo "The two outputs were different "
diff youranswer correctanswer
echo "Do you wish to see the ouputs side-by-side?"
select yn in "Yes" "No"; do
case $yn in
Yes ) echo "LEFT: Your Output RIGHT: Solution Output"
sleep 1
vimdiff youranswer correctanswer; break;;
No ) exit;;
esac
done
fi
done
答案 1 :(得分：0)
我认为你可以这样做：
your_path=../test/test
test_path=../../public/test
file_input="$1"
while read -r -u 3 contents
do
# Display output of the test file
"$test_path" $contents > correctanswer 2>&1
# Display output of your file
"$your_path" $contents > youranswer 2>&1
# diff the solutions
diff correctanswer youranswer > /dev/null 2>&1
if [ $? -eq 0 ]
then
echo "The two outputs were exactly the same "
else
echo "$divider"
echo "The two outputs were different "
diff youranswer correctanswer
echo "Do you wish to see the ouputs side-by-side?"
select yn in "Yes" "No"; do
case $yn in
Yes) echo "LEFT: Your Output RIGHT: Solution Output"
sleep 1
vimdiff youranswer correctanswer
break;;
No) exit;;
esac
done
fi
done 3< "$file_input"
修改，以便read命令读取文件描述符3，保留标准输入可用于select等。
我不知道你在做什么导致它失败。我创建了两个程序test1和test2。最初，它们完全相同：
printf "%s\n" "$@"
然后我改变了test2所以它包含：
printf "%s\n" "1$@2"
将此数据放在input.file：
9 11 22 13
2 35 32 16
我运行了脚本botched.sh：
$ bash -x botched.sh input.file
+ '[' -f /etc/bashrc ']'
+ . /etc/bashrc
++ '[' -z '' ']'
++ return
+ alias 'r=fc -e -'
+ your_path=./test1
+ test_path=./test2
+ file_input=input.file
+ read -r -u 3 contents
+ ./test2 9 11 22 13
+ ./test1 9 11 22 13
+ diff correctanswer youranswer
+ '[' 0 -eq 0 ']'
+ echo 'The two outputs were exactly the same '
The two outputs were exactly the same
+ read -r -u 3 contents
+ ./test2 2 35 32 16
+ ./test1 2 35 32 16
+ diff correctanswer youranswer
+ '[' 0 -eq 0 ']'
+ echo 'The two outputs were exactly the same '
The two outputs were exactly the same
+ read -r -u 3 contents
$
输出被认为是相同的，正如您所期望的那样。然后使用修改后的test2，我重申了它：
$ bash -x botched.sh input.file
+ '[' -f /etc/bashrc ']'
+ . /etc/bashrc
++ '[' -z '' ']'
++ return
+ alias 'r=fc -e -'
+ your_path=./test1
+ test_path=./test2
+ file_input=input.file
+ read -r -u 3 contents
+ ./test2 9 11 22 13
+ ./test1 9 11 22 13
+ diff correctanswer youranswer
+ '[' 1 -eq 0 ']'
+ echo ''
+ echo 'The two outputs were different '
The two outputs were different
+ diff youranswer correctanswer
1c1
< 9
---
> 19
4c4
< 13
---
> 132
+ echo 'Do you wish to see the ouputs side-by-side?'
Do you wish to see the ouputs side-by-side?
+ select yn in '"Yes"' '"No"'
1) Yes
2) No
#? 1
+ case $yn in
+ echo 'LEFT: Your Output RIGHT: Solution Output'
LEFT: Your Output RIGHT: Solution Output
+ sleep 1
+ vimdiff youranswer correctanswer
2 files to edit
+ break
+ read -r -u 3 contents
+ ./test2 2 35 32 16
+ ./test1 2 35 32 16
+ diff correctanswer youranswer
+ '[' 1 -eq 0 ']'
+ echo ''
+ echo 'The two outputs were different '
The two outputs were different
+ diff youranswer correctanswer
1c1
< 2
---
> 12
4c4
< 16
---
> 162
+ echo 'Do you wish to see the ouputs side-by-side?'
Do you wish to see the ouputs side-by-side?
+ select yn in '"Yes"' '"No"'
1) Yes
2) No
#? 2
+ case $yn in
+ exit
$
vimdiff程序确实运行并显示差异。
请注意基本调试技术 - 使用bash -x运行。它显示读取带有四个数字的单行输入，然后传递给代理程序test1和test2;然后需要第二行，并将其传递给代理项目。
实际测试代码：
your_path=./test1 #../test/test
test_path=./test2 #../../public/test
file_input="$1"
while read -r -u 3 contents
do
# Display output of the test file
"$test_path" $contents > correctanswer 2>&1
# Display output of your file
"$your_path" $contents > youranswer 2>&1
# diff the solutions
diff correctanswer youranswer > /dev/null 2>&1
if [ $? -eq 0 ]
then
echo "The two outputs were exactly the same "
else
echo "$divider"
echo "The two outputs were different "
diff youranswer correctanswer
echo "Do you wish to see the ouputs side-by-side?"
select yn in "Yes" "No"; do
case $yn in
Yes) echo "LEFT: Your Output RIGHT: Solution Output"
sleep 1
vimdiff youranswer correctanswer
break;;
No) exit;;
esac
done
fi
done 3< "$file_input"
在Mac OS X 10.9.2上使用Bash 3.2.51进行测试。
如果它不适合你，那么你需要设置代理测试程序，类似于我的，并显示你在脚本上运行bash -x得到的结果。您还应该识别正在运行的平台以及正在运行的Bash版本。