diff --git a/calculator/MainWindow.py b/calculator/MainWindow.py
index 234c81c..efcd2eb 100644
--- a/calculator/MainWindow.py
+++ b/calculator/MainWindow.py
@@ -244,8 +244,9 @@ def setupUi(self, MainWindow):
         self.pushButton_eq.setStyleSheet("QPushButton {\n"
 "color: #4CAF50;\n"
 "}")
+
         self.pushButton_eq.setObjectName("pushButton_eq")
-        self.gridLayout.addWidget(self.pushButton_eq, 5, 2, 1, 2)
+        self.gridLayout.addWidget(self.pushButton_eq, 5, 3, 1, 1)
         self.verticalLayout.addLayout(self.gridLayout)
         self.verticalLayout_2.addLayout(self.verticalLayout)
         MainWindow.setCentralWidget(self.centralWidget)
@@ -266,9 +267,24 @@ def setupUi(self, MainWindow):
         self.menuFile.addAction(self.actionExit)
         self.menuBar.addAction(self.menuFile.menuAction())
 
+        # 在setupUi方法中添加以下代码，创建小数点按钮
+        self.pushButton_dot = QtWidgets.QPushButton(self.centralWidget)
+        self.pushButton_dot.setMinimumSize(QtCore.QSize(0, 50))
+        font = QtGui.QFont()
+        font.setPointSize(27)
+        font.setBold(True)
+        font.setWeight(75)
+        self.pushButton_dot.setFont(font)
+        self.pushButton_dot.setStyleSheet("QPushButton {\n"
+                                          "color: #1976D2;\n"
+                                          "}")
+        self.pushButton_dot.setObjectName("pushButton_dot")
+        self.gridLayout.addWidget(self.pushButton_dot, 5, 2, 1, 1)
+
         self.retranslateUi(MainWindow)
         QtCore.QMetaObject.connectSlotsByName(MainWindow)
 
+
     def retranslateUi(self, MainWindow):
         _translate = QtCore.QCoreApplication.translate
         MainWindow.setWindowTitle(_translate("MainWindow", "Calculon"))
@@ -315,4 +331,7 @@ def retranslateUi(self, MainWindow):
         self.actionExit.setShortcut(_translate("MainWindow", "Ctrl+Q"))
         self.actionReset.setText(_translate("MainWindow", "Reset"))
         self.actionReset.setShortcut(_translate("MainWindow", "Ctrl+R"))
+        # 在retranslateUi方法中添加以下代码，为小数点按钮设置文本
+        self.pushButton_dot.setText(_translate("MainWindow", "."))
+        self.pushButton_dot.setShortcut(_translate("MainWindow", "."))
 
diff --git a/calculator/calculator.py b/calculator/calculator.py
index 4b7feb0..0044805 100644
--- a/calculator/calculator.py
+++ b/calculator/calculator.py
@@ -18,9 +18,11 @@ def __init__(self, *args, **kwargs):
 
         # Setup numbers.
         for n in range(0, 10):
-            getattr(self, 'pushButton_n%s' % n).pressed.connect(lambda v=n: self.input_number(v))
+            getattr(self, 'pushButton_n%s' % n).pressed.connect(lambda value=n: self.input_number(value))
+
 
         # Setup operations.
+        self.pushButton_dot.pressed.connect(lambda: self.input_dot())
         self.pushButton_add.pressed.connect(lambda: self.operation(operator.add))
         self.pushButton_sub.pressed.connect(lambda: self.operation(operator.sub))
         self.pushButton_mul.pressed.connect(lambda: self.operation(operator.mul))
@@ -66,7 +68,15 @@ def input_number(self, v):
             self.state = INPUT
             self.stack[-1] = v
         else:
-            self.stack[-1] = self.stack[-1] * 10 + v
+            current_input = str(self.stack[-1])
+            # 检查当前输入是否已经包含小数点
+            if '.' in current_input:
+                # 如果包含小数点，将新输入的数字添加到小数点后面
+                integer_part, decimal_part = current_input.split('.')
+                self.stack[-1] = float(f"{integer_part}.{decimal_part}{v}")
+            else:
+                # 如果没有小数点，将新输入的数字追加到当前输入
+                self.stack[-1] = self.stack[-1] * 10 + v
 
         self.display()
 
@@ -103,6 +113,17 @@ def equals(self):
                 self.state = READY
                 self.display()
 
+    def input_dot(self):
+        if self.state == READY:
+            self.state = INPUT
+            self.stack[-1] = 0
+
+        # 检查当前输入是否已经包含小数点
+        if '.' not in str(self.stack[-1]):
+            # 如果没有小数点，添加小数点到当前输入
+            self.stack[-1] = str(self.stack[-1]) + '.'
+            self.display()
+
 
 if __name__ == '__main__':
     app = QApplication([])