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diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher.png
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher.png
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher.png
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/values/colors.xml b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/values/colors.xml
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/values/colors.xml
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/values/colors.xml
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/values/dimens.xml b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/values/dimens.xml
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/values/dimens.xml
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/values/dimens.xml
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/values/selectDown.xml b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/values/selectDown.xml
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/values/selectDown.xml
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/values/selectDown.xml
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/values/strings.xml b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/values/strings.xml
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/values/strings.xml
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/values/strings.xml
diff --git a/SoftEngineering_selectiveCourse/app/src/main/res/values/styles.xml b/(source code)SoftEngineering_selectiveCourse/app/src/main/res/values/styles.xml
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/main/res/values/styles.xml
rename to (source code)SoftEngineering_selectiveCourse/app/src/main/res/values/styles.xml
diff --git a/SoftEngineering_selectiveCourse/app/src/test/java/com/example/softengineering_selectivecourse/ExampleUnitTest.java b/(source code)SoftEngineering_selectiveCourse/app/src/test/java/com/example/softengineering_selectivecourse/ExampleUnitTest.java
similarity index 100%
rename from SoftEngineering_selectiveCourse/app/src/test/java/com/example/softengineering_selectivecourse/ExampleUnitTest.java
rename to (source code)SoftEngineering_selectiveCourse/app/src/test/java/com/example/softengineering_selectivecourse/ExampleUnitTest.java
diff --git a/SoftEngineering_selectiveCourse/build.gradle b/(source code)SoftEngineering_selectiveCourse/build.gradle
similarity index 100%
rename from SoftEngineering_selectiveCourse/build.gradle
rename to (source code)SoftEngineering_selectiveCourse/build.gradle
diff --git a/SoftEngineering_selectiveCourse/gradle.properties b/(source code)SoftEngineering_selectiveCourse/gradle.properties
similarity index 100%
rename from SoftEngineering_selectiveCourse/gradle.properties
rename to (source code)SoftEngineering_selectiveCourse/gradle.properties
diff --git a/SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.jar b/(source code)SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.jar
similarity index 100%
rename from SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.jar
rename to (source code)SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.jar
diff --git a/SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.properties b/(source code)SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.properties
similarity index 100%
rename from SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.properties
rename to (source code)SoftEngineering_selectiveCourse/gradle/wrapper/gradle-wrapper.properties
diff --git a/SoftEngineering_selectiveCourse/gradlew b/(source code)SoftEngineering_selectiveCourse/gradlew
similarity index 96%
rename from SoftEngineering_selectiveCourse/gradlew
rename to (source code)SoftEngineering_selectiveCourse/gradlew
index cccdd3d..518efff 100644
--- a/SoftEngineering_selectiveCourse/gradlew
+++ b/(source code)SoftEngineering_selectiveCourse/gradlew	
@@ -1,172 +1,172 @@
-#!/usr/bin/env sh
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=$((i+1))
-    done
-    case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=$(save "$@")
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
-exec "$JAVACMD" "$@"
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/SoftEngineering_selectiveCourse/gradlew.bat b/(source code)SoftEngineering_selectiveCourse/gradlew.bat
similarity index 100%
rename from SoftEngineering_selectiveCourse/gradlew.bat
rename to (source code)SoftEngineering_selectiveCourse/gradlew.bat
diff --git a/SoftEngineering_selectiveCourse/settings.gradle b/(source code)SoftEngineering_selectiveCourse/settings.gradle
similarity index 100%
rename from SoftEngineering_selectiveCourse/settings.gradle
rename to (source code)SoftEngineering_selectiveCourse/settings.gradle
diff --git a/doc/RequirementAnalysis/World of our own 软件需求规格说明书--选修课选课系统.docx b/World of our own 软件需求规格说明书--选修课选课系统.docx
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