C++ Tutorial for Beginners - Learn C++ in 1 Hour
Programming with Mosh・5 minutes read
The C++ course led by Mash Hamadani covers basic to advanced concepts, aiming to build confident coding skills and is practical, comprehensive, and easy to follow. Students will learn about key C++ features, syntax, the C++ Standard Library, and practical applications through exercises and structured lessons.
Insights
- C++ course led by Mash Hamadani covers basics to advanced concepts, aiming for confident coding by course end. C++ remains relevant due to speed and memory efficiency, utilized by major companies like Adobe, Google, and Microsoft.
- Learning C++ involves mastering syntax, Standard Library, and practical coding techniques. Course structure includes three parts with exercises, covering variables, mathematical expressions, input/output operations, libraries like cmath, and fundamental data types.
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What is C++ used for?
C++ is used by major companies like Adobe, Google, Microsoft, Netflix, and NASA.
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Summary
00:00
Master C++ with Mash Hamadani's Course
- Course covers everything from basics to advanced concepts in C++
- Aim is to enable confident C++ coding by course end
- Course is comprehensive, easy to follow, well-organized, and practical
- No prior C++ or programming knowledge required
- Instructor is Mash Hamadani, a software engineer with over 20 years of experience
- C++ is used by major companies like Adobe, Google, Microsoft, Netflix, and NASA
- New version of C++ released every three years, with version 20 being the latest
- C++ is still relevant due to its speed and memory efficiency
- Learning C++ involves mastering the language syntax and the C++ Standard Library (STL)
- STL provides pre-written code for common functionalities like data structures and algorithms
16:13
"Enhancing Videos and Learning C++ Basics"
- To change themes in videos, go to Preferences, Appearance and Behavior, Appearance, and select a theme.
- More themes can be added by clicking a link and sorting by downloads to choose popular ones like Dracula.
- Install the chosen theme to enhance the appearance of the videos in C Lion.
- The course on C++ is structured into three parts: basics, intermediate, and advanced concepts.
- Each part is about 3-4 hours long, with exercises to improve problem-solving skills.
- The course covers data types, decision making, loops, functions, arrays, pointers, strings, and more.
- Variables in programming store data temporarily in memory, with meaningful names and initialization.
- Constants prevent variable value changes, using the const keyword before declaration.
- Naming conventions like snake case, pascal case, camel case, and Hungarian notation are discussed.
- Mathematical expressions in C++ involve operators like addition, subtraction, multiplication, division, modulus, and increment/decrement.
33:20
Understanding Increment Operator in C++ Operations
- The increment operator, denoted as x++, is used for increasing a variable's value by 1.
- There is no equivalent operator for multiplication or division, only increment and decrement.
- The increment operator can be applied as a postfix or prefix, affecting the variable differently.
- When applied as a postfix, the current value of x is assigned to another variable before incrementing x.
- Applying the increment operator as a prefix first increments x and then assigns the new value to another variable.
- Mathematical expressions prioritize multiplication and division over addition and subtraction.
- Parentheses can alter the order of operations in mathematical expressions.
- An exercise involves implementing a mathematical expression in C++ with given values for variables.
- Techniques for writing to the console in C++ involve using the std namespace and stream insertion operator.
- Reading input from the console in C++ is done using the c in object and stream extraction operator.
51:10
C++ Programming Basics and Functions
- The program allows for reading multiple values, changing a label to enter values for x and y, declaring variables x and y, reading x and y, and printing their sum.
- The program functions as a simple calculator, accepting input for x and y, and displaying the result.
- The program can handle numbers separated by spaces, demonstrating flexibility in input format.
- Chaining statements together is possible, reducing code length while maintaining functionality.
- An exercise is given to convert temperatures from Fahrenheit to Celsius, requiring user input for Fahrenheit temperature and displaying the converted Celsius temperature.
- The solution involves printing a label for Fahrenheit, reading the Fahrenheit temperature, calculating the Celsius temperature, and displaying it.
- The lesson introduces the cmath library for mathematical functions, suggesting online resources for further information.
- The seal function rounds up a value, while the floor function rounds down a value, with examples provided.
- The pow function calculates the power of a number, requiring two arguments.
- An exercise is proposed to calculate the area of a circle based on user input for the radius, with a solution involving pi and the power function.
- Comments are discussed as a means to clarify code, with examples of single-line and multi-line comments provided.
- The section on fundamental data types in C++ is introduced, covering integer, floating point, boolean, character, and string types, as well as arrays.
- The distinction between statically typed languages like C++ and dynamically typed languages like Python is explained.
- Various built-in data types in C++ are detailed, including int, short, long, double, float, long double, bool, and char.
- Different ways to declare and initialize variables in C++ are demonstrated, including specifying types explicitly, using suffixes for float and long types, and utilizing the auto keyword for type inference.
- Brace initialization is introduced as a modern C++ feature for initializing variables.
01:08:17
Variable initialization, number systems, and random numbers.
- Using braces for variable initialization prevents assigning wrong values, causing compilation errors if incorrect values are input.
- Brace initialization ensures variables are initialized to zero if no value is supplied, preventing unpredictable outcomes.
- Different number systems like decimal, binary, and hexadecimal are used in math and programming for various purposes.
- Hexadecimal numbers are more compact and are commonly used in programming to represent colors, simplifying color representation.
- The "unsigned" keyword in C++ restricts numerical types from accepting negative values, potentially causing unexpected results.
- Narrowing occurs when initializing a variable of a smaller type with a larger type, leading to data loss or warnings.
- Random numbers in C++ are generated using the "rand" function from the "cstdlib" library, but require seeding with different values for true randomness.
- Seeding the random number generator with the current time in seconds from 1970 ensures different random numbers on each program run, allowing for more randomness.
