From a2289833e59c852b79532b47aebf17a33b95cb9c Mon Sep 17 00:00:00 2001
From: Zhongheng Liu <z.liu@outlook.com.gr>
Date: Thu, 6 Feb 2025 07:47:50 +0000
Subject: oop

---
 oop/oop.py             |  32 ++++++++++++++++
 recursion/recursion.py | 101 +++++++++++++++++++++++++------------------------
 2 files changed, 83 insertions(+), 50 deletions(-)
 create mode 100644 oop/oop.py

diff --git a/oop/oop.py b/oop/oop.py
new file mode 100644
index 0000000..4ef15d7
--- /dev/null
+++ b/oop/oop.py
@@ -0,0 +1,32 @@
+import math
+class shape:
+    def __init__(self):
+        pass
+    def area(self):
+        pass
+class circle(shape):
+    def __init__(self, r):
+        shape.__init__(self)
+        self._radius = r
+    def area(self):
+        return self._radius * self._radius * math.pi
+class rectangle(shape):
+    def __init__(self, side1, side2):
+        shape.__init__(self)
+        self._a = side1
+        self._b = side2
+    def area(self):
+        return self._a * self._b
+class square(shape):
+    def __init__(self, side):
+        shape.__init__(self)
+        self._side = side
+    def area(self):
+        return self._side ** 2
+
+sq = square(4)
+cir = circle(7)
+rect = rectangle(3,6)
+print(sq.area())
+print(cir.area())
+print(rect.area())
\ No newline at end of file
diff --git a/recursion/recursion.py b/recursion/recursion.py
index dd51531..f46be80 100644
--- a/recursion/recursion.py
+++ b/recursion/recursion.py
@@ -1,50 +1,51 @@
-def fact(n: int): return n * fact(n-1) if n != 0 else 1
-
-def compound(p: float, r: float, y: int) -> float:
-    return p if y == 0 else compound(p*r, r, y-1)
-
-def print_fib(a, b, l):
-    print(a)
-    print(b)
-    print_next_fib(a, b, l-3)
-
-def print_next_fib(a: int, b: int, l: int):
-    if l == 0:
-        print(a+b)
-        return
-    print(a+b)
-    return print_next_fib(b, a+b, l-1)
-
-def fib_nth(n: int):
-    if n == 1:
-        return 0
-    if n == 2:
-        return 1
-    return fib_nth(n-1) + fib_nth(n-2)
-
-def draw_underline(l: int):
-    return '-'*l
-
-def test():
-    range_end = 15
-    print(f"Printing series of factorials from 1 to {range_end}\n{draw_underline(20)}")
-    for i in range(1, range_end):
-        print(fact(i), end=", " if i < range_end-1 else "\n")
-    fib_until = 15
-    print(f"\n\nPrinting fibonacci sequence to {fib_until}\n{draw_underline(20)}")
-    print_fib(0, 1, fib_until)
-    print(fib_nth(5))
-    print(compound(36800*4, 1.06, 10) / (43129-3170*12))
-def payback(tuition: int, rate: int, salary: int):
-    years = 0
-    remaining = tuition * 4
-
-    while remaining > 0:
-        remaining -= salary
-        years += 1
-        remaining *= rate
-        print(f"Year {years}: remaining: {remaining}")
-    print(years)
-
-if __name__ == "__main__":
-    test()
+def fact(n: int): return n * fact(n-1) if n != 0 else 1
+
+def compound(p: float, r: float, y: int) -> float:
+    return p if y == 0 else compound(p*r, r, y-1)
+
+def print_fib(a, b, l):
+    print(a)
+    print(b)
+    print_next_fib(a, b, l-3)
+
+def print_next_fib(a: int, b: int, l: int):
+    if l == 0:
+        print(a+b)
+        return
+    print(a+b)
+    return print_next_fib(b, a+b, l-1)
+
+def fib_nth(n: int):
+    if n == 1:
+        return 0
+    if n == 2:
+        return 1
+    return fib_nth(n-1) + fib_nth(n-2)
+
+def draw_underline(l: int):
+    return '-'*l
+
+def test():
+    range_end = 15
+    print(f"Printing series of factorials from 1 to {range_end}\n{draw_underline(20)}")
+    for i in range(1, range_end):
+        print(fact(i), end=", " if i < range_end-1 else "\n")
+    fib_until = 15
+    print(f"\n\nPrinting fibonacci sequence to {fib_until}\n{draw_underline(20)}")
+    print_fib(0, 1, fib_until)
+    print(fib_nth(5))
+    print(compound(36800*4, 1.06, 10) / (43129-3170*12))
+def payback(tuition: int, rate: int, salary: int):
+    years = 0
+    remaining = tuition * 4
+
+    while remaining > 0:
+        remaining -= salary
+        years += 1
+        remaining *= rate
+        print(f"Year {years}: remaining: {remaining}")
+    print(years)
+
+if __name__ == "__main__":
+    test()
+
-- 
cgit