Help me see this program title

女狼一共舞

Write a shell script that takes a folder path as input, and if the input is empty, the current directory is used as input. Print out the file names in this directory with the suffixes .c and .cpp, and then compare the files. If there are files with the same content, print their names!

skywater00

Not complicated, you should study it yourself
Problems involved
1. The script receives command line arguments
2. Determine the current directory
3. Traverse a certain type of file
4. Compare file contents
5. Looping of script programs

女狼一共舞

I just do n’t know how to do it in the loop,

女狼一共舞

#! /bin/sh
function compare
{
if [`cd $Dname` ]; then
            list=`ls *.{.c,.cpp}`
        echo "the result of compare:"
        for file in $list; do
             for otherfile in $list; do
                   if [$file!=$otherfile ]; then
                        if [![ cmp $file $otherfile] ]; then
                                echo "$file and $otherfile have the same content"
                        fi
                   fi
             done
         done
}
                          
echo "input a directory name"
read Dname
if [$Dname!="" ]; then
compare
else
$Dname="." #use current directory as input
compare
fi

#Is there something wrong with my writing? I have adjusted it and I haven't debugged it now. Which expert can help me see! Thank you

女狼一共舞

A "fi" is missing in the function

skywater00

if [`cd $Dname` ]; then
list=`ls *.{.c,.cpp}`
fi
--------------------------
In addition, your main program part can be adjusted and optimized
echo "input a directory name"
read Dname
if [$Dname="" ]; then
$Dname="."
fi
compare

skywater00

In fact, the main program may be safer like this
echo "input a directory name"
read Dname
if [-n $Dname ]; then
   if [-d $Dname ]; then
     echo'The input parameter is not a valid directory'
     exit 1
   fi
else
     $Dname="."
fi
compare
------------------------------------------
Generally, the input of directory parameters is best to use command line parameters, so that it is more convenient for programs to call each other.
In the result output part defined by function compare, it is best to change echo "the result of compare:" to
echo "the result of compare in"`pwd`":"

女狼一共舞

thank you very much! !