diff --git a/src/__pycache__/uncertainly.cpython-38.pyc b/src/__pycache__/uncertainly.cpython-38.pyc
new file mode 100644
index 0000000..1fcf636
Binary files /dev/null and b/src/__pycache__/uncertainly.cpython-38.pyc differ
diff --git a/src/log.py b/src/log.py
new file mode 100644
index 0000000..f09f064
--- /dev/null
+++ b/src/log.py
@@ -0,0 +1 @@
+import logger
diff --git a/src/main.py b/src/main.py
new file mode 100644
index 0000000..3b36705
--- /dev/null
+++ b/src/main.py
@@ -0,0 +1,16 @@
+from uncertainly import Uncertainly
+
+number_input = input("Data input:")
+type_B_uncertain: float = float(input("type_B_uncertain: "))
+param_tp: float = float(input("tp input: "))
+
+number_list:tuple = number_input.split()
+
+try:
+    numbers = [float(num_str) for num_str in number_list]
+    print(numbers)
+    uncertain_processor = Uncertainly(data=numbers, type_B_uncertain=type_B_uncertain,param_tp=param_tp)
+    uncertain_processor.output_std()
+
+except Exception as e:
+    print(e)
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diff --git a/src/uncertainly.py b/src/uncertainly.py
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index 0000000..693d3b4
--- /dev/null
+++ b/src/uncertainly.py
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+from math import sqrt
+
+class Uncertainly:
+    __slots__ = [
+        "average",
+        "length",
+        "standard_deviation",
+        "type_A_uncertain",
+        "type_B_uncertain",
+        "total_uncertain",
+        "data"
+    ]
+
+    def __init__(self, data: tuple, type_B_uncertain: float, param_tp: float):
+        self.data = data
+        self.average:float = sum(self.data) / len(self.data)
+        self.length = len(self.data)
+        
+    # def cal_standard_deviation(self):
+        data_cut = [(datum-self.average) ** 2 for datum in self.data]
+
+        self.standard_deviation:float = sqrt(sum(data_cut) / (self.length - 1))
+
+        self.type_A_uncertain:float = param_tp * self.standard_deviation / sqrt(self.length)
+
+        self.total_uncertain = 2 * sqrt(self.type_A_uncertain**2 + type_B_uncertain**2)
+        self.type_B_uncertain = type_B_uncertain
+
+    def output_std(self):
+        print(f"平均为：{self.data}/{self.length}={self.average}\n")
+        # print(f"{self.average}\n")
+        print(f"标准差：{round(self.standard_deviation,4)}")
+        print(f"3S区间：[{round(self.average - 3 * self.standard_deviation,4)},{round(self.average +3 * self.standard_deviation,4)}]")
+        print(f"B类不确定度确认：{self.type_B_uncertain}\n")
+        print(f"总不确定度：2 * ✓{round(self.type_A_uncertain,4)}^2 + {round(self.type_B_uncertain,4)}^2={round(self.total_uncertain,4)}")
+        print(f"结果表达式为：{round(self.average,4)}+-{round(self.total_uncertain,4)}")
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