C-2 Introduction.pdf

Fundamentals of Programming (C) Mingtao Pei School of Computer Science peimt@bit.edu.cn Lecture 2 Introduction Outline 2.1 Overview of C 2.2 Basic Structure of C Program 2.3 Essential Elements of C 2.4 Programming Process 3 Outline 2.1 Overview of C 2.2 Basic Structure of C Program 2.3 Essential Elements of C 2.4 Programming Process 4 The History of C n  1967 Martin.Richads of Cambridge: CPL→ BCPL n  1970 Ken ·Thompson of Bell Laboratories: BCPL→ B n  1972 Dennis ·Ritchie of Bell Laboratories: B→ C n  1973 K.Thompson D.Ritchie: Rewrite UNIX by C n  1977 UNIXC are widely used 5 The History of C n  1978 The famous book 《The C Programming Language》is published n  By the early 1980s, C evolved into Traditional C n  In the late 1980s, ANSI created draft standards for ANSI C or standard C n  In 1990, ISO accepted ANSI C as ISO standard C 6 Why C ？ n  C is portable. Code written on one machine can be easily moved to another n  C is terse n  C is modular n  C is the basis of C++ and java n  C is efficient on most machines. n  Criticism of C n  Complicated syntax n  No automatic array bounds checking 7 Outline 2.1 Overview of C 2.2 Basic Structure of C Program 2.3 Essential Elements of C 2.4 Programming Process 8 Example C program 9 Another Example