Merge pull request '10215501411 Wu Mianzhi Lab1' (#14) from 10215501411/Computer-Systems-Labs:master into master

Reviewed-on: https://gitea.shuishan.net.cn/52265903006/Computer-Systems-Labs/pulls/14

lab1/10215501411.sh

@@ -0,0 +1,57 @@
+SAMESTR="ThisIsTheSameString" #Same String for uniq 
+readonly SAMESTR
+
+##
+# Get random integar between 1 and 100
+##
+function getRandomName(){
+    rnd=`expr $RANDOM % 64 + 1`
+    return $rnd
+}
+
+##
+# Get random string, first parametar is length
+##
+function getRandomString(){
+    openssl rand -base64 $1
+}
+
+function generate(){
+    size=500
+    i=0
+    while(( $i < $size ))
+    do
+        getRandomName
+        length=$?
+        #echo "START"
+        if [[ $length -ge 1  && $length -le 25 ]] 
+        then
+            echo $SAMESTR
+        else
+            echo `getRandomString $length`
+        fi
+        let "i++"
+    done
+}
+
+function sortByASCII(){
+    generate | sort | uniq -u
+}
+
+function sortByNumeric(){
+    generate | sort --numeric-sort | uniq -u
+}
+
+echo "Overwrite lines:" > resultASCII #this line should not appear in output file
+sortByASCII > resultASCII
+echo "Append lines:" >> resultASCII #this line should appear in output file
+sortByASCII >> resultASCII
+
+echo "Overwrite lines:" > resultNumeric #this line should not appear in output file
+sortByNumeric > resultNumeric
+echo "Append lines:" >> resultNumeric #this line should appear in output file
+sortByNumeric >> resultNumeric
+
+echo "Number of same string in file:"
+generate > randomLines
+grep --only-matching $SAMESTR < randomLines | wc --lines