Decision Structures and Boolean Logic
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This document discusses decision structures and Boolean logic in Python. It covers if, if-else, and if-elif-else statements for conditionally executing code blocks based on Boolean expressions. Boolean expressions use relational operators like ==, >, < to compare values and return True or False. Strings can also be compared. Nested if statements allow conditional checks within other conditional blocks. Proper indentation is important for readability and syntax.
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Object-Oriented SoftwareMunazza-Mah-Jabeen This document discusses object-oriented software development processes and use case modeling. It covers the evolution of development processes like the waterfall model and unified process. Use case modeling identifies actors, use cases, and scenarios to define system requirements. Use cases are then used to identify real-world entities and candidates for classes with attributes and messages. The document also addresses programming problems, UML diagrams, writing code with header and CPP files, and simplifications.
Templates and Exceptions
Templates and ExceptionsMunazza-Mah-Jabeen This document discusses templates and exceptions in C++. It covers function templates and how they allow a single function to operate on different data types. It also discusses class templates and how templates are represented in UML diagrams. Finally, it provides an overview of exceptions in C++, including the syntax for throwing and catching exceptions and how control flows when an exception is thrown.
Dictionaries and Sets
Dictionaries and SetsMunazza-Mah-Jabeen A dictionary in Python is a collection of key-value pairs where keys must be unique and immutable. It allows looking up values by their associated keys similar to a real-world dictionary. Keys are used as indexes to retrieve their corresponding values. Dictionaries are mutable and unordered collections that can hold elements of different data types. Common operations on dictionaries include adding, updating, and removing key-value pairs as well as accessing elements by their keys.
More About Strings
More About StringsMunazza-Mah-Jabeen This document discusses sequences and strings in Python. It covers accessing individual characters in strings using indexes and slicing, string immutability, testing strings with in and not in operators, and using string methods like upper(), lower(), count(), and repetition with *. Strings can be indexed and sliced to extract substrings. Common errors like IndexError may occur when indexes are out of range. Strings are immutable so they cannot be modified once created.
Streams and Files
Streams and FilesMunazza-Mah-Jabeen This document discusses input and output streams in C++. It covers the stream classes ifstream, ofstream, and fstream for reading from and writing to files. It explains that files must be opened before reading from or writing to them using the open() function. Data can then be written to files using the insertion operator << and read from files using the extraction operator >>, similar to standard input/output. The document provides examples of opening, reading, and writing files in C++.
Lists and Tuples
Lists and TuplesMunazza-Mah-Jabeen This document provides an overview of Python data structures, specifically lists. It defines data structures as ways of storing data to make operations more efficient. It describes built-in and user-defined data structures, and focuses on lists as a general Python data structure that allows ordered sequences of mixed data types. Key characteristics of lists include mutability, indexing, slicing, and built-in methods for sorting, appending, and other operations. The document contrasts lists with the immutable string data type.
Files and Exceptions
Files and ExceptionsMunazza-Mah-Jabeen This chapter discusses files and exceptions in Python. It covers opening, reading from, and writing to text files, as well as processing records stored in files. It also discusses exception handling using try/except blocks to prevent program crashes from expected errors like invalid file openings or data conversions. Finally, it discusses the use of else and finally clauses to handle exceptions and perform cleanup operations.
Functions
FunctionsMunazza-Mah-Jabeen The document discusses functions in Python. It defines what a function is, how to define and call functions, and how to pass arguments to and return values from functions. It also covers topics like local and global variables, built-in functions from modules like math, and organizing functions into modules to structure large programs. The key benefits of using functions include breaking programs into simple and reusable pieces of code.
Pointers
PointersMunazza-Mah-Jabeen Pointers are used to access array elements, pass arguments to functions that need to modify the original argument, pass arrays and strings to functions, obtain memory from the system, and create data structures like linked lists. Pointers contain the address of another variable and can be accessed using the dereference operator (*). Pointers must have a value and can be either constants or variables. Pointers are also used to pass arrays and strings to functions as well as sort arrays and manage memory.
Repitition Structure
Repitition StructureMunazza-Mah-Jabeen The document discusses different types of repetition structures in Python including condition-controlled loops like while loops which repeat as long as a condition is true, and count-controlled loops like for loops which iterate a specific number of times. It provides examples of using while and for loops, and concepts like calculating running totals with accumulators, using sentinels to mark the end of input sequences, input validation loops, and nested loops where one loop is inside another.
Inheritance
InheritanceMunazza-Mah-Jabeen Inheritance allows for the creation of derived classes that inherit capabilities from base classes, while allowing the derived classes to add their own unique properties and behaviors. The chapter discusses key inheritance concepts like access specifiers, generalization in UML class diagrams, substituting base class constructors and member functions, protected access specifiers, abstract base classes, public and private inheritance, multiple inheritance, and aggregation. Multiple inheritance can lead to ambiguity if member functions and constructors are not implemented carefully.
Operator Overloading
Operator OverloadingMunazza-Mah-Jabeen Operator overloading allows normal C++ operators like +, -, and = to be used with user-defined types by giving them additional meanings. This chapter discusses overloading unary operators, binary operators, arithmetic assignment operators, and the subscript operator [], as well as data conversion and conversions between different classes. It also covers UML class diagrams and some pitfalls to avoid like ambiguity, as well as the keywords explicit and mutable which control conversions and changing const object data.
Memory Management
Memory ManagementMunazza-Mah-Jabeen The document summarizes key concepts of memory management techniques used in operating systems, including basic memory management, swapping, virtual memory, and paging. It explains how memory is divided into pages that are mapped to physical frames using page tables, allowing processes to access more memory than is physically available through swapping pages in and out of main memory from disk. The goal of these techniques is to make the best use of available memory and allow processes to run without being aware of physical memory limitations.
Arrays and Strings
Arrays and StringsMunazza-Mah-Jabeen This document discusses arrays and strings in chapter 7 of a textbook. It covers array fundamentals like defining, accessing, and initializing arrays, as well as multidimensional arrays, passing arrays to functions, arrays of structures, arrays as class member data, arrays of objects, and C-strings and strings. The document is broken into sections on these array and string topics as taught in a computer science course.
Objects and Classes
Objects and ClassesMunazza-Mah-Jabeen This document discusses object-oriented programming concepts in C++ including classes, objects, defining classes and objects, private and public access specifiers, constructors, destructors, static class data, and constant objects. It covers key topics such as defining a simple class with member functions and data, calling member functions on objects, using objects as arguments, and structuring classes and objects in memory.
Functions
FunctionsMunazza-Mah-Jabeen This document discusses functions in computer programming. It defines a function as a unit of code that performs a specific task, is given a name, and can be called from other parts of a program. The key benefits of functions are that they organize programs conceptually and reduce overall program size by storing code in one place that can be executed multiple times. The document outlines different parts of functions like declarations, definitions, arguments, return values, scope, and storage classes. It also covers topics like recursion, overloaded functions, and passing arguments by value versus by reference.
Structures
StructuresMunazza-Mah-Jabeen A structure is a collection of simple variables grouped together under a single name. It allows grouping of related data. Structures can contain nested structures and members are accessed using the dot operator. An example shows a structure used to store room measurements with nested structures for length and width. Enumerations are user-defined data types that allow a set of named constants.
Loops and Decisions
Loops and DecisionsMunazza-Mah-Jabeen This document discusses different types of flow control statements including sequence, iteration, selection, and relational operators. It covers for, while, do, if, if...else, else if, and switch statements. It provides details on the initialization expression, test expression, increment expression, nesting loops and if statements, logical operators, and statements like break, continue, and goto.
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