change：windows下主题改为windows。

main.cpp

@@ -1,22 +1,25 @@
 #include <QApplication>
+#include <clocale>
 
 #include "MainWidget.h"
 
 int main(int argc, char *argv[])
 {
+    setlocale(LC_ALL, ".utf-8");
+
     QApplication a(argc, argv);
 
 #ifdef _WIN32
     QFont font("Microsoft YaHei", 9);
     a.setFont(font);
     //a.setStyle("fusion");
+    a.setStyle("windows");
 #endif
 
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 #endif
 
-    //a.setStyle("windows");
     MainWidget w;
     w.set_work_exe(argv[0]);
     w.show();