C language

SOME HISTORY

Dennis Ritchie  1941-2011 Ken Thompson

1943 until now

CHARACTER SET

• Lowercase and uppercase letters: a–z A–Z

•Decimal digits: 0–9

•Graphic characters: ! " # % & ' ( ) * + , - . / : ; < = > ? [ \ ] ^ _ { | } ~

KEYWORDS• 32 keywords

OPERATORS

“HELLO, WORLD”

• Appeared in the 1st edition of K&R as an example

USES

System programming Website programming

RELATED LANGUAGES

STATISTIC

QUESTION:

When was C language developed?

Between 1969 and 1973

QUESTION:

Who were the developers of C language?

The developers of C language were Dennis Ritchie and Ken Tompson.

QUESTION: What was the original purpose of developing C language?

C language was originally developed to re-implement UNIX operating system.

QUESTION:

What character sets are included in C?

• Lowercase and uppercase letters: a–z, A–Z

• Decimal digits: 0–9

• Graphic characters: ! " # % & ' ( ) * + , - . / : ; < = > ? [ \ ] ^ _ { | } ~

QUESTION:

How many keywords are there in C language?

There are 32 keywords in C language.

QUESTION: How was named the first example program appeared in K&R?

It was named “Hello, World!”

QUESTION: Where is C language widely used nowadays?

C is widely used for “system programming” and website programming.

THANK YOU