1. CS 330 Programming Languages
Dr. Blaise W. Liffick
Spring 2019

2. Programming Techniques Languages Programming Environments
Problem Analysis
Program Design
Algorithms & Design Patterns
Data Structures
Paradigms
Java
C++
Hardware
Network
Linux
Eclipse
Programming
Environments

3. Early Computers Late 1930’s, John Atanasoff, Clifford Berry ENIAC 1946
University of Pennsylvania
J. Presper Eckert and John Mauchley
John von Neumann, stored-program concept

4. First Generation: 1940 – 1956 Vacuum tubes Scientific oriented ENIAC
UNIVAC – first commercial computer

5. Second Generation: 1956 – 1963 Transistors replaced vacuum tubes
I/O via punch cards and printers
First “high-level” languages developed
Data processing introduced

6. Third Generation: 1964 - 1971 Integrated circuit (semiconductors)
Keyboards & monitors
Time sharing
Computer “families”
Minicomputers vs. mainframes

7. Fourth Generation: 1971 – ? VLSI CPU on a chip: Microprocessor
Microcomputers & Supercomputers

8. Fifth Generation: ??? Based on artificial intelligence
Big “Fifth Gen” project by Japanese in 1980’s
Voice recognition, parallel processing, superconductors

9. Categories of Computers
Supercomputers
Mainframe
Minicomputers
Microcomputers
Mobile devices
Power
Size
Cost

10. Programming Languages
Machine Language
Most fundamental language of the computer
Unique for each processor type
Binary 0s and 1s that specify what to do

11. Table 1.2 A Program in Machine and Assembly Language

12. High - Level Languages Resemble human language
Java, C++, C, Pascal, FORTRAN, Ada
a = a + b;
More compact and human understandable than machine language
Must be translated into machine language

13. 1.4 Processing a High-Level Language Program
Set of programs used to develop software
A key component is a translator
Compiler
Examples
Java, g++, Microsoft Visual C++®
Other programs needed
Editor
Linker
Loader
IDE
(e.g. Eclipse)

14. Processing a Program Editor used to enter the program
Like minimal word processor
Creates source program file
Compiler translates the source program
Displays syntax errors
Creates (usually) temporary object code file
Linker/Loader to combine object file with other object files and execute program
Creates final executable program

15. Executing a Program CPU Special instructions used to
examines each program instruction in memory
sends out command signals required to carry out the instruction
Special instructions used to
input data into memory for the program to use
output data to display or printer (or other device)

16. Compilers Source File Object File Other Object Files Executable File
Editor used to create program
Compilers
Source File
Compiler translates program into machine language
successful
unsuccessful
Object File
Error Messages
Linker connects object files
Loader prepares for execution
Other Object Files
Executable File

17. Java .java .class Source File Byte Codes Other Object Files
Editor used to create program
Java
.java
Source File
Compiler translates program into machine language
successful
unsuccessful
Byte Codes
.class
Error Messages
Other Object Files
Java Runtime Environment