Programming Languages

Question 1

History of Programming Languages

Answer 1

Machine, Assembly, High Level, Structured, Object Oriented languages
Older still exist, have been updated but rarely used.
Earlier are closer to the machine and they get farther and farther away

Question 2

Machine Language

Answer 2

Binary (0, 1),

• First computers
• Easy to make errors

Question 3

Assembly Language

Answer 3

MOV B, A (mnemonics) 
-Easier to understand
-Still difficult
-Different computers have different assembly languages
Early 50s

Question 4

High Level Language

Answer 4

Fortran -> scientific applications (IF, READ, WRITE)
Cobol -> economics
Late 50s
-logic and technical education, much easier to learn
-farther from computer language
-no discipline, no style, easier to just restart than to find problems
Spaghetti Programs
-Jumps and not sequences

Question 5

Structured Language

Answer 5

Pascal ('69)
C ('73) - A reference point
  -more compact, easier for computer
  -started by BCPL
Must start and finish inside
Late '60s

Question 6

Object Oriented Language

Answer 6

C++ (82’) -became more complex
Java (‘95 Canadian) - black box
- Like a library
-Objects allow programs to become even bigger