diff --git a/RedPandaIDE/RedPandaIDE_zh_CN.qm b/RedPandaIDE/RedPandaIDE_zh_CN.qm
index f0faa842..6bd1c580 100644
Binary files a/RedPandaIDE/RedPandaIDE_zh_CN.qm and b/RedPandaIDE/RedPandaIDE_zh_CN.qm differ
diff --git a/RedPandaIDE/RedPandaIDE_zh_CN.ts b/RedPandaIDE/RedPandaIDE_zh_CN.ts
index 319a6bb4..f91456ad 100644
--- a/RedPandaIDE/RedPandaIDE_zh_CN.ts
+++ b/RedPandaIDE/RedPandaIDE_zh_CN.ts
@@ -1003,7 +1003,7 @@ Are you really want to continue?</source>
     <message>
         <location filename="mainwindow.cpp" line="274"/>
         <source>Open</source>
-        <translation>打开打开</translation>
+        <translation>打开</translation>
     </message>
     <message>
         <location filename="mainwindow.cpp" line="499"/>
diff --git a/RedPandaIDE/colorscheme.cpp b/RedPandaIDE/colorscheme.cpp
index 4ea93439..421c5bcd 100644
--- a/RedPandaIDE/colorscheme.cpp
+++ b/RedPandaIDE/colorscheme.cpp
@@ -575,6 +575,7 @@ bool ColorManager::add(const QString &name, PColorScheme scheme)
     scheme->setCustomed(false);
     mSchemes[name] = scheme;
     saveScheme(name);
+    return true;
 }
 
 PColorScheme ColorManager::get(const QString &name)
@@ -634,6 +635,7 @@ bool ColorManager::saveScheme(const QString &name)
         return false;
     QString newFilepath = generateFullPathname(name,scheme->bundled(),scheme->customed());
     scheme->save(newFilepath);
+    return true;
 }
 
 QString ColorManager::generateFullPathname(const QString &name, bool isBundled, bool isCustomed)
diff --git a/RedPandaIDE/editor.cpp b/RedPandaIDE/editor.cpp
index b807285f..9ad4501e 100644
--- a/RedPandaIDE/editor.cpp
+++ b/RedPandaIDE/editor.cpp
@@ -252,7 +252,7 @@ void Editor::keyPressEvent(QKeyEvent *event)
     bool handled = false;
     QString t = event->text();
     if (!t.isEmpty()) {
-        QChar ch = t;
+        QChar ch = t[0];
         switch (ch.unicode()) {
         case '"':
         case '\'':
diff --git a/RedPandaIDE/editor.h b/RedPandaIDE/editor.h
index 3c385cc4..54225385 100644
--- a/RedPandaIDE/editor.h
+++ b/RedPandaIDE/editor.h
@@ -94,9 +94,9 @@ private:
     // QWidget interface
 protected:
     void wheelEvent(QWheelEvent *event) override;
-    void focusInEvent(QFocusEvent *event);
-    void focusOutEvent(QFocusEvent *event);
-    void keyPressEvent(QKeyEvent *event);
+    void focusInEvent(QFocusEvent *event) override;
+    void focusOutEvent(QFocusEvent *event) override;
+    void keyPressEvent(QKeyEvent *event) override;
 };
 
 #endif // EDITOR_H
diff --git a/RedPandaIDE/main.cpp b/RedPandaIDE/main.cpp
index 20e6ea6c..251440cc 100644
--- a/RedPandaIDE/main.cpp
+++ b/RedPandaIDE/main.cpp
@@ -84,5 +84,6 @@ int main(int argc, char *argv[])
         return retCode;
     }  catch (BaseError e) {
         QMessageBox::critical(nullptr,QApplication::tr("Error"),e.reason());
+        return -1;
     }
 }
diff --git a/RedPandaIDE/qsynedit/CodeFolding.cpp b/RedPandaIDE/qsynedit/CodeFolding.cpp
index ef3a1111..7eb65b99 100644
--- a/RedPandaIDE/qsynedit/CodeFolding.cpp
+++ b/RedPandaIDE/qsynedit/CodeFolding.cpp
@@ -6,7 +6,7 @@ int SynEditFoldRegions::count()
     return fRegions.size();
 }
 
-int SynEditFoldRegions::add(bool addEnding, const QChar &openSymbol, const QChar &closeSymbol, const QString &highlight)
+PSynEditFoldRegion SynEditFoldRegions::add(bool addEnding, const QChar &openSymbol, const QChar &closeSymbol, const QString &highlight)
 {
     PSynEditFoldRegion region = std::make_shared<SynEditFoldRegion>();
     region->addEnding = addEnding;
@@ -14,6 +14,7 @@ int SynEditFoldRegions::add(bool addEnding, const QChar &openSymbol, const QChar
     region->closeSymbol = closeSymbol;
     region->highlight = highlight;
     fRegions.push_back(region);
+    return region;
 }
 
 PSynEditFoldRegion SynEditFoldRegions::get(int index)
@@ -104,7 +105,7 @@ void SynEditFoldRanges::insert(int index, PSynEditFoldRange range)
     mRanges.insert(index,range);
 }
 
-int SynEditFoldRanges::remove(int index)
+void SynEditFoldRanges::remove(int index)
 {
     mRanges.remove(index);
 }
diff --git a/RedPandaIDE/qsynedit/CodeFolding.h b/RedPandaIDE/qsynedit/CodeFolding.h
index f2604b97..1dbf6689 100644
--- a/RedPandaIDE/qsynedit/CodeFolding.h
+++ b/RedPandaIDE/qsynedit/CodeFolding.h
@@ -13,7 +13,7 @@ private:
     std::vector<PSynEditFoldRegion> fRegions;
 public:
     int count();
-    int add(bool addEnding, const QChar& openSymbol, const QChar& closeSymbol, const QString& highlight);
+    PSynEditFoldRegion add(bool addEnding, const QChar& openSymbol, const QChar& closeSymbol, const QString& highlight);
     PSynEditFoldRegion get(int index);
 };
 typedef std::shared_ptr<SynEditFoldRegions> PSynFoldRegions;
@@ -54,7 +54,7 @@ public:
                                int aFromLine, PSynEditFoldRegion aFoldRegion, int aToLine);
 
     void insert(int index, PSynEditFoldRange range);
-    int remove(int index);
+    void remove(int index);
     void add(PSynEditFoldRange foldRange);
     PSynEditFoldRange operator[](int index) const;
 };
diff --git a/RedPandaIDE/qsynedit/SynEdit.cpp b/RedPandaIDE/qsynedit/SynEdit.cpp
index 63ab14eb..0e64211d 100644
--- a/RedPandaIDE/qsynedit/SynEdit.cpp
+++ b/RedPandaIDE/qsynedit/SynEdit.cpp
@@ -553,6 +553,7 @@ int SynEdit::charToColumn(int aLine, int aChar) const
         QString s = mLines->getString(aLine - 1);
         return charToColumn(s,aChar);
     }
+    return aChar;
 }
 
 int SynEdit::charToColumn(const QString &s, int aChar) const
@@ -587,6 +588,7 @@ int SynEdit::columnToChar(int aLine, int aColumn) const
         }
         return i+1;
     }
+    return aColumn;
 }
 
 int SynEdit::stringColumns(const QString &line, int colsBefore) const
@@ -2537,6 +2539,7 @@ QString SynEdit::expandAtWideGlyphs(const QString &S)
         j++;
     }
     Result.resize(j);
+    return Result;
 }
 
 void SynEdit::updateModifiedStatus()
@@ -2577,7 +2580,7 @@ int SynEdit::scanFrom(int Index)
     return Result;
 }
 
-int SynEdit::scanRanges()
+void SynEdit::scanRanges()
 {
     if (mHighlighter && !mLines->empty()) {
         mHighlighter->resetState();
@@ -4227,6 +4230,7 @@ int SynEdit::InsertTextByColumnMode(const QString &Value, bool AddToUndoList)
     } while (P<Value.length());
     mCaretX+=Str.length();
     mStatusChanges.setFlag(SynStatusChange::scCaretX);
+    return Result;
 }
 
 int SynEdit::InsertTextByLineMode(const QString &Value)
@@ -4258,6 +4262,7 @@ int SynEdit::InsertTextByLineMode(const QString &Value)
             P++;
         Start = P;
     } while (P<Value.length());
+    return Result;
 }
 
 void SynEdit::DeleteFromTo(const BufferCoord &start, const BufferCoord &end)
@@ -4829,7 +4834,7 @@ bool SynEdit::event(QEvent *event)
         break;
     }
     }
-    QAbstractScrollArea::event(event);
+    return QAbstractScrollArea::event(event);
 }
 
 void SynEdit::focusInEvent(QFocusEvent *)
diff --git a/RedPandaIDE/qsynedit/SynEdit.h b/RedPandaIDE/qsynedit/SynEdit.h
index 77a59491..58bbad0e 100644
--- a/RedPandaIDE/qsynedit/SynEdit.h
+++ b/RedPandaIDE/qsynedit/SynEdit.h
@@ -379,7 +379,7 @@ private:
     QString expandAtWideGlyphs(const QString& S);
     void updateModifiedStatus();
     int scanFrom(int Index);
-    int scanRanges();
+    void scanRanges();
     void uncollapse(PSynEditFoldRange FoldRange);
     void collapse(PSynEditFoldRange FoldRange);
 
diff --git a/RedPandaIDE/qsynedit/TextBuffer.cpp b/RedPandaIDE/qsynedit/TextBuffer.cpp
index 1e2a8183..1ed29b4d 100644
--- a/RedPandaIDE/qsynedit/TextBuffer.cpp
+++ b/RedPandaIDE/qsynedit/TextBuffer.cpp
@@ -243,7 +243,7 @@ int SynEditStringList::add(const QString &s)
     return Result;
 }
 
-int SynEditStringList::addStrings(const QStringList &Strings)
+void SynEditStringList::addStrings(const QStringList &Strings)
 {
     if (Strings.count() > 0) {
         mIndexOfLongestLine = -1;
@@ -739,7 +739,7 @@ SynChangeReason SynEditUndoList::LastChangeReason()
     if (mItems.count() == 0)
         return SynChangeReason::crNothing;
     else
-        mItems.last()->changeReason();
+        return mItems.last()->changeReason();
 }
 
 void SynEditUndoList::Lock()
diff --git a/RedPandaIDE/qsynedit/TextBuffer.h b/RedPandaIDE/qsynedit/TextBuffer.h
index 84d59847..89122a5e 100644
--- a/RedPandaIDE/qsynedit/TextBuffer.h
+++ b/RedPandaIDE/qsynedit/TextBuffer.h
@@ -75,7 +75,7 @@ public:
     void endUpdate();
 
     int add(const QString& s);
-    int addStrings(const QStringList& Strings);
+    void addStrings(const QStringList& Strings);
 
     int getTextLength();
     void clear();
diff --git a/RedPandaIDE/qsynedit/highlighter/base.cpp b/RedPandaIDE/qsynedit/highlighter/base.cpp
index 4e55c3e0..c431cb73 100644
--- a/RedPandaIDE/qsynedit/highlighter/base.cpp
+++ b/RedPandaIDE/qsynedit/highlighter/base.cpp
@@ -89,13 +89,13 @@ bool SynHighlighter::isIdentChar(const QChar &ch) const
     if (ch == '_') {
         return true;
     }
-    if (ch>='0' && ch <= '9') {
+    if ((ch>='0') && (ch <= '9')) {
         return true;
     }
-    if (ch>='a' && ch <= 'z') {
+    if ((ch>='a') && (ch <= 'z')) {
         return true;
     }
-    if (ch>='A' && ch <= 'Z') {
+    if ((ch>='A') && (ch <= 'Z')) {
         return true;
     }
 
diff --git a/RedPandaIDE/settingsdialog/editorsymbolcompletionwidget.cpp b/RedPandaIDE/settingsdialog/editorsymbolcompletionwidget.cpp
index 5dceb274..05e3f50c 100644
--- a/RedPandaIDE/settingsdialog/editorsymbolcompletionwidget.cpp
+++ b/RedPandaIDE/settingsdialog/editorsymbolcompletionwidget.cpp
@@ -1,5 +1,6 @@
 #include "editorsymbolcompletionwidget.h"
 #include "ui_editorsymbolcompletionwidget.h"
+#include "../settings.h"
 
 EditorSymbolCompletionWidget::EditorSymbolCompletionWidget(const QString& name, const QString& group, QWidget *parent) :
     SettingsWidget(name,group,parent),
@@ -12,3 +13,33 @@ EditorSymbolCompletionWidget::~EditorSymbolCompletionWidget()
 {
     delete ui;
 }
+
+void EditorSymbolCompletionWidget::doLoad()
+{
+    ui->grpCompleSymbols->setChecked(pSettings->editor().completeSymbols());
+    ui->chkCompleteBrace->setChecked(pSettings->editor().completeBrace());
+    ui->chkCompleteBracket->setChecked(pSettings->editor().completeBracket());
+    ui->chkCompleteComments->setChecked(pSettings->editor().completeComment());
+    ui->chkCompleteDoubleQuotation->setChecked(pSettings->editor().completeDoubleQuote());
+    ui->chkCompleteGlobalInclude->setChecked(pSettings->editor().completeGlobalInclude());
+    ui->chkCompleteParenthesis->setChecked(pSettings->editor().completeParenthese());
+    ui->chkCompleteSingleQuotation->setChecked(pSettings->editor().completeSingleQuote());
+    ui->chkRemoveMatchingSymbols->setChecked(pSettings->editor().removeMathcingSymbol());
+    ui->chkSkipMathingSymbols->setChecked(pSettings->editor().overwriteSymbols());
+}
+
+void EditorSymbolCompletionWidget::doSave()
+{
+    pSettings->editor().setCompleteSymbols(ui->grpCompleSymbols->isChecked());
+    pSettings->editor().setCompleteBrace(ui->chkCompleteBrace->isChecked());
+    pSettings->editor().setCompleteBracket(ui->chkCompleteBracket->isChecked());
+    pSettings->editor().setCompleteComment(ui->chkCompleteComments->isChecked());
+    pSettings->editor().setCompleteDoubleQuote(ui->chkCompleteDoubleQuotation->isChecked());
+    pSettings->editor().setCompleteGlobalInclude(ui->chkCompleteGlobalInclude->isChecked());
+    pSettings->editor().setCompleteParenthese(ui->chkCompleteParenthesis->isChecked());
+    pSettings->editor().setCompleteSingleQuote(ui->chkCompleteSingleQuotation->isChecked());
+    pSettings->editor().setRemoveMathcingSymbol(ui->chkRemoveMatchingSymbols->isChecked());
+    pSettings->editor().setOverwriteSymbols(ui->chkSkipMathingSymbols->isChecked());
+
+    pSettings->editor().save();
+}