From 7a20598ffb586eeab668497f21db9925640487f9 Mon Sep 17 00:00:00 2001
From: KURWAss <IdnkSolution@gmail.com>
Date: Sat, 22 Aug 2026 14:34:51 +0300
Subject: [PATCH 1/3] Added power method and fixed some things

---
 calculator.py | 40 +++++++++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 11 deletions(-)

diff --git a/calculator.py b/calculator.py
index 306879a..e45735f 100644
--- a/calculator.py
+++ b/calculator.py
@@ -3,27 +3,44 @@ def add(self, a, b):
         return a + b
 
     def subtract(self, a, b):
-        return b - a
+        return a - b
 
     def multiply(self, a, b):
         result = 0
-        for i in range(b+1):
+        for _ in range(abs(b)):
             result = self.add(result, a)
-        return result
+        return result if b >= 0 else -result
 
     def divide(self, a, b):
+        if b == 0:
+            raise ZeroDivisionError("Division by zero")
+        sign = -1 if (a < 0) ^ (b < 0) else 1
+        a, b = abs(a), abs(b)
         result = 0
-        while a > b:
+        while a >= b:
             a = self.subtract(a, b)
             result += 1
-        return result
-    
+        return result * sign
+
     def modulo(self, a, b):
-        while a <= b:
-            a = a-b
-        return a
+        if b == 0:
+            raise ZeroDivisionError("Modulo by zero")
+        sign = -1 if a < 0 else 1
+        a, b = abs(a), abs(b)
+        while a >= b:
+            a = self.subtract(a, b)
+        return a * sign
+
+    def power(self, a, b):
+        if b == 0:
+            return 1
+        if b < 0:
+            return 1 / self.power(a, -b)
+        result = 1
+        for _ in range(b):
+            result = self.multiply(result, a)
+        return result
 
-# Example usage:
 if __name__ == "__main__":
     calc = Calculator()
     print("This is a simple calculator class!")
@@ -31,4 +48,5 @@ def modulo(self, a, b):
     print("Example: subtraction: ", calc.subtract(4, 2))
     print("Example: multiplication: ", calc.multiply(2, 3))
     print("Example: division: ", calc.divide(10, 2))
-    print("Example: modulo: ", calc.modulo(10, 3))
\ No newline at end of file
+    print("Example: modulo: ", calc.modulo(10, 3))
+    print("Example: power: ", calc.power(2, 3))

From 7570b4a647a90e7a0ac44bb5c189da28aba0f0e4 Mon Sep 17 00:00:00 2001
From: KURWAss <IdnkSolution@gmail.com>
Date: Sat, 22 Aug 2026 14:36:22 +0300
Subject: [PATCH 2/3] Fixed README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index c8a6302..3f393d8 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # python-calculator
 
-This is a very simple calculator program for learning how to write unit tests in Python. It contains a Calculator class (*calculator.py*) which perform 4 mathematic operations: add, subtract, multiply, and divide. You have to add unit test cases to test them in the file *test_calculator.py*. 
\ No newline at end of file
+This is a very simple calculator program for learning how to write unit tests in Python. It contains a Calculator class (*calculator.py*) which perform 5 mathematic operations: add, subtract, multiply, power, and divide. You have to add unit test cases to test them in the file *test_calculator.py*. 

From f9727f17bb8f949750a79c7e8b974e0e18d045ba Mon Sep 17 00:00:00 2001
From: KURWAss <IdnkSolution@gmail.com>
Date: Sat, 22 Aug 2026 15:05:44 +0300
Subject: [PATCH 3/3] Edited .gitignore

---
 .gitignore | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.gitignore b/.gitignore
index 520fc7e..f97ae69 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 __pycache__/calculator.cpython-312.pyc
 __pycache__/test_calculator.cpython-312.pyc
+*.exe
+*.bin
+*.o