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Author: Awrsha

03 C C++ Python R and Mojo review/03-1 C and C++ Review/Optional/child.h

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+// child.h
+#include "grandparent.h"
+#include "parent.h"

03 C C++ Python R and Mojo review/03-1 C and C++ Review/Optional/grandparent.h

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+// grandparent.h
+#pragma once
+
+struct foo {
+    int member;
+};
+
+/*
+// grandparent.h
+#ifndef GRANDPARENT_H
+#define GRANDPARENT_H
+
+struct foo {
+    int member;
+};
+
+#endif  // GRANDPARENT_H
+*/

03 C C++ Python R and Mojo review/03-1 C and C++ Review/Optional/main.cpp

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+// main.cpp
+#include "child.h"
+
+int main() {
+    int member;
+}

03 C C++ Python R and Mojo review/03-1 C and C++ Review/Optional/parent.h

@@ -0,0 +1,2 @@
+// parent.h
+#include "grandparent.h"

03 C C++ Python R and Mojo review/03-1 C and C++ Review/optional/02.c

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+import sys
+
+arr = [12, 24, 36, 48, 60]
+
+# Size of array
+size = len(arr)
+print("Size of arr:", size)  # Output: 5
+
+# Checking the size of an integer in bytes (Python dynamically sizes integers)
+print("Size of an integer in bytes:", sys.getsizeof(1))  # Typical output: 28 bytes on a 64-bit system

03 C C++ Python R and Mojo review/03-2 Python Review/02 Custom Types/01.py

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+import sys
+from dataclasses import dataclass
+
+@dataclass
+class Point:
+    x: float
+    y: float
+
+# Creating an instance of Point
+p = Point(1.1, 2.5)
+
+# Calculating memory size of the instance
+size = sys.getsizeof(p.x) + sys.getsizeof(p.y)
+print("Size of Point:", size)  # Output varies due to Python's memory overhead, usually larger than C

03 C C++ Python R and Mojo review/03-2 Python Review/02 Custom Types/02.py

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+# Python version
+
+# c-style type casting
+f = 69.69
+i = int(f)  # Convert float to int
+print(i)  # Output: 69 (decimal truncated)
+
+# to char
+c = chr(i)  # Convert int to char using ASCII value
+print(c)  # Output: E

03 C C++ Python R and Mojo review/03-2 Python Review/03 Type Casting/01.py

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+PI = 3.14159
+
+# Function to calculate the area
+def area(r):
+    return PI * r * r
+
+# Set radius with conditional logic
+radius = 7  # Default value
+
+if radius > 10:
+    radius = 10
+elif radius < 5:
+    radius = 5
+else:
+    radius = 7
+
+# Calculate and print the area
+print(f"Area of circle with radius {radius}: {area(radius)}")

03 C C++ Python R and Mojo review/03-2 Python Review/04 Macros & Global Vars/01.py

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+class Person:
+    def __init__(self, age, name):
+        self.age = age
+        self.name = name
+
+# Create person1
+person1 = Person(25, "elliot")
+print(f"age: {person1.age}\tname: {person1.name}")
+
+# Create person2
+person2 = Person(20, "not elliot")
+print(f"age: {person2.age}\tname: {person2.name}")