Module 1 - Introduction to FOP.pdf

Fundamentals of Programming MODULE 1 Story: https://nextshark.com/isabel-sieh-youngest-programmer-startup/  Module 1 Introduction to Programming  COURSE INTENDED LEARNING OUTCOMES CILO 1: Discuss the importance of Programming and apply simple input and output state...

Fundamentals of Programming MODULE 1 Story: https://nextshark.com/isabel-sieh-youngest-programmer-startup/  Module 1 Introduction to Programming  COURSE INTENDED LEARNING OUTCOMES CILO 1: Discuss the importance of Programming and apply simple input and output statements.  Lesson Objectives Learn about programming tasks Learn object-oriented programming concepts Learn about the C# programming language Learn how to write a C# program that produces output Learn how to select identifiers to use within your programs  “ “Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” ― Martin Fowler  Program Defined A computer program is a set of instructions that you write to tell a computer what to do.  Program? A computer program is a set of instructions that you write that tells a computer what to do Programmer? Programming? Programming is the action or process of writing A programmer a person who writes computer programs. computer programs.  LEVELS OF PROGRAMMING LANGUAGES MACHINE HIGH ASSEMBLY LEVEL LEVEL LANGUAGE LANGUAGE LANGUAGE consists of a set of instructions contains mnemonic commands consists of English-like statements that that are in the binary form 0 or 1. such as mov, add, sub, etc. are easy to understand  Machine Language The only language that is ever actually executed by a computer. Composed of instructions encoded as strings of 0's and 1's. Never written and rarely read directly by programmers  Assembly Language contains mnemonic commands such as mov, add, sub, etc. 1-1: One assembly language instruction corresponds to one machine language instruction. The Assembler (a program) translates assembly code into machine code.  High Level Language consists of English-like statements that are easy to understand Assembly language is still tedious to work in so most work done in HLL. Translated into machine language by a Compiler (sometimes an intermediate language). One-to-many: One HLL statement translates into several or several dozen of machine instructions.  Compiler Source Code Object Code (High Level Language) Compiler (Machine Language) The language processor that reads the complete source program written in high level language as a whole in one go and translates it into an equivalent program in machine language.  Assembler Source Code Object Code (Assembly Language) Assembler (Machine Language) The Assembler is used to translate the program written in Assembly language into machine code.  Interpreter Source Code Object Code (High Level Language) Interpreter (Machine Language) The translation of single statement of source program into machine code is done by language processor and executes it immediately before moving on to the next line.  The C# Programming Language C# was developed as an object-oriented and component-oriented language It exists as part of the Visual Studio.NET package C# (like Java) is modeled after the C++ programming language Pointers are not used in C# C# does NOT require the use of object destructors, forward declarations, or #include files It has the ability to pass by reference Multiple inheritance is not allowed in C# Writing a C# Program that Produces Output “This is my first C# program” is a literal string of characters The string appears in parenthesis because it is a parameter or an argument The WriteLine() method prints a line of output on the screen Writing a C# Program that Produces Output Out is an object that represents the screen The Out object was created and endowed with the method WriteLine() Not all objects have the WriteLine() method Writing a C# Program that Produces Output Console is a class Console defines the attributes of a collection of similar “Console” objects Writing a C# Program that Produces Output System is a namespace, which is a scheme that provides a way to group similar classes Namespaces are used to organize classes Compiling and Executing a Program from the Command Line After creating source code, you must do the following before you can view the program output: Compile the source code into intermediate language (IL) Use the C# just in time (JIT) compiler to translate the intermediate code into executable statements Compiling and Executing a Program from the Command Line After compiling your source code (typing csc followed by the filename), you will have three possible outcomes: You receive an operating system error message You receive one or more program language error messages You receive no error messages, indicating that the program has compiled successfully Compiling and Executing a Program from the Command Line If you receive an operating system message it may mean that: You misspelled the command csc You misspelled the filename You forgot to include the extensions.cs with the filename You didn’t use the correct case You are not within the correct subdirectory or folder on your command line The C# compiler was not installed properly You need to set a path command Compiling and Executing a Program from the Command Line A syntax error occurs when you introduce typing errors into your program. The C# compiler issues warnings as wells as errors If a syntax error occurs, you must reopen the source code and make the necessary corrections If you compile the program with no errors (using csc file.cs) you can run the program from the command prompt by typing the name of the.exe file created Compiling and Executing a Program from the Command Line Thanks! Any questions? References: https://www.tutorialsteacher.com/csharp/csharp-operators https://www.tutlane.com/tutorial/csharp/csharp-operators- precedence-with-examples https://nextshark.com/isabel-sieh-youngest-programmer- startup/