course content

Course Content

C Basics

1. Introduction

What is C?Structure of the C-ProgramStructure of the C-program 2/2How to Run the Program?

2. Data

DataVariablesPrintfArraysArrays 2/2Char and StringSizeofChallenge: PrintfChallenge: Sizeof

3. Operators

Assignment, Comparison, Not Equal ToSum, Difference, Increment, DecrementMultiplication, Division and ModuloComparison OperatorsChallenge: Comparison OperatorsLogical OperatorsChallenge: Logical Operators

4. Control Statements

If...Else OperatorChallenge: If...Else OperatorTernary OperatorSwitch, BreakWhile, Do...WhileFor, ContinueChallenge: For Loop

5. Functions

Structure of the FunctionDeclaration, Type and ReturnArgumentsChallenge: ArgumentsHeader, Prototypes Void, Recursion

6. Pointers

Pointers are around UsReferences and DereferencesPointersMalloc and FreeFunctions, Arrays and Two PointersVoid

C Basics

Structure of the C-program 2/2Structure of the C-program 2/2

Let's continue with our first program:

c

Main.c

printf

printf() is a function that prints something to the screen, in our case, the text "Hello, c<>definity!". The text must be enclosed in double quotes, for example:

Control characters

Note

The C language treats \n as one character, not two ("\" and "n").

The \n character means the end of the line. That is, everything after this character in the text field will be transferred to the next line:

c

Main.c

In our course, we will sometimes use the \t (tabulation) character, which means a tab - 4 spaces.

c

Main.c

Semicolon (;)

; - the character of the end of the expression. Every expression in C must end with a ;. It can be compared to a dot at the end of a sentence.

Return

return - is a return statement. The C standard requires the main function to behave this way (return 0). This has a practical use on UNIX systems, but in this case, it is a statement of the "Exit status". In simple terms, the program ends with this statement. The return statement will be covered in more detail later in this course.

Everything was clear?

Section 1. Chapter 3