Semester-1-22-23-Introduction_to_c_programming.ppt

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ChetanChauhan203001

This document outlines the objectives and key topics for an introduction to the C programming language. It will cover writing a basic "Hello World" program, understanding C program structure with blocks and comments, using basic data types like integers and characters, declaring and initializing variables, and input/output concepts. The document introduces C as a structured, high-level language and discusses identifiers, constants, and basic data types before explaining how to write a first program in C.

1
Objectives
❏ To understand the structure of a C-language program.
❏ To write your first C program.
❏ To introduce the include preprocessor command.
❏ To be able to create good identifiers for objects in a program.
❏ To be able to list, describe, and use the C basic data types.
❏ To be able to create and use variables and constants.
❏ To understand input and output concepts.
❏ To be able to use simple input and output statements.
Introduction to the C Language

2
Background
C is a structured programming language. It is
considered a high-level language because it allows the
programmer to concentrate on the problem at hand
and not worry about the machine that the program
will be using. That is another reason why it is used by
software developers whose applications have to run on
many different hardware platforms.

3
C Programs
It's time to write your first C program.
Structure of a C Program
Your First C Program
Comments
The Greeting Program
Topics discussed in this section:

9
Identifiers
One feature present in all computer languages is the
identifier. Identifiers allow us to name data and other
objects in the program. Each identified object in the
computer is stored at a unique address.

16
sizeof (short) ≤ sizeof (int) ≤ sizeof (long) ≤ sizeof (long long)
Note

17
Typical Integer Sizes and Values for Signed Integers

19
sizeof (float) ≤ sizeof (double) ≤ sizeof (long double)
Note

21
Variables
Variables are named memory locations that have a type,
such as integer or character, which is inherited from
their type. The type determines the values that a variable
may contain and the operations that may be used with
its values.
Variable Declaration
Variable Initialization
Topics discussed in this section:

23
Examples of Variable Declarations and Definitions

25
Constants
Constants are data values that cannot be changed
during the execution of a program. Like variables,
constants have a type. In this section, we discuss
Boolean, character, integer, real, complex, and string
constants.
Constant Representation
Coding Constants
Topics discussed in this section:

26
Symbolic Names for Control Characters

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Semester-1-22-23-Introduction_to_c_programming.ppt

1. 1 Objectives ❏ To understand the structure of a C-language program. ❏ To write your first C program. ❏ To introduce the include preprocessor command. ❏ To be able to create good identifiers for objects in a program. ❏ To be able to list, describe, and use the C basic data types. ❏ To be able to create and use variables and constants. ❏ To understand input and output concepts. ❏ To be able to use simple input and output statements. Introduction to the C Language

2. 2 Background C is a structured programming language. It is considered a high-level language because it allows the programmer to concentrate on the problem at hand and not worry about the machine that the program will be using. That is another reason why it is used by software developers whose applications have to run on many different hardware platforms.

3. 3 C Programs It's time to write your first C program. Structure of a C Program Your First C Program Comments The Greeting Program Topics discussed in this section:

4. 4 Structure of a C Program

5. 5 The Greeting Program

6. 6 The Greeting Program

7. 7 Examples of Block Comments

8. 8 Examples of Line Comments

9. 9 Identifiers One feature present in all computer languages is the identifier. Identifiers allow us to name data and other objects in the program. Each identified object in the computer is stored at a unique address.

10. 10 Rules for Identifiers

11. 11 C is a case-sensitive language. Note

12. 12 Examples of Valid and Invalid Names

13. 13 Data Types

14. 14 Character Types

15. 15 Integer Types

16. 16 sizeof (short) ≤ sizeof (int) ≤ sizeof (long) ≤ sizeof (long long) Note

17. 17 Typical Integer Sizes and Values for Signed Integers

18. 18 Floating-point Types

19. 19 sizeof (float) ≤ sizeof (double) ≤ sizeof (long double) Note

20. 20 Type Summary

21. 21 Variables Variables are named memory locations that have a type, such as integer or character, which is inherited from their type. The type determines the values that a variable may contain and the operations that may be used with its values. Variable Declaration Variable Initialization Topics discussed in this section:

22. 22 Variables

23. 23 Examples of Variable Declarations and Definitions

24. 24 Variable Initialization ‘B’

25. 25 Constants Constants are data values that cannot be changed during the execution of a program. Like variables, constants have a type. In this section, we discuss Boolean, character, integer, real, complex, and string constants. Constant Representation Coding Constants Topics discussed in this section:

26. 26 Symbolic Names for Control Characters

27. 27 Examples of Integer Constants

28. 28 Examples of Real Constants

Editor's Notes

#3: Developed early 1970’s
#15: wchar_t is a wide character: The increased datatype size allows for the use of larger coded character sets. Width is compiler specific (not portable).