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diff --git a/q01_create_class/__pycache__/build.cpython-36.pyc b/q01_create_class/__pycache__/build.cpython-36.pyc
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diff --git a/q01_create_class/build.py b/q01_create_class/build.py
index a0188d6..a11d0b0 100644
--- a/q01_create_class/build.py
+++ b/q01_create_class/build.py
@@ -1,15 +1,37 @@
+# %load q01_create_class/build.py
 import pandas as pd
 import numpy as np
 import math
 
-"write your solution here"
+#'write your solution here'
 
 
 class complex_number:
-    """The complex number class.
+    def __init__(self, real, imag):
+        self.real = real
+        self.imag = imag
+    def __add__(self, other):
+        return complex(self.real+other.real, self.imag+other.imag)
+    def __sub__(self, other):
+        return complex(self.real-other.real, self.imag-other.imag)
+    def __mul__(self, other):
+        return complex(self.real*other.real-self.imag*other.imag, self.real*other.imag+self.imag*other.real)
+    def __truediv__(self, no):
+        conj = complex(no.real, no.imag*(-1))
+        num = self*conj
+        denom = no*conj
+        realQuo = num.real/denom.real
+        imaginaryQuo = num.imag/denom.real
+        return (realQuo, imaginaryQuo)
+
+    def abs(self):
+        return math.sqrt(self.real**2 + self.imag**2)
+    
+    def conjugate(self):
+        return complex(self.real, -self.imag)
+    def argument(self):
+        return math.degrees(math.atan(self.imag/self.real))
+    
+
 
-    Attributes:
-    attr1 (x): Real part of complex number.
-    attr2 (y): Imaginary part of complex number.
 
-    """
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