Genealogy of Programming Languages Pre-computer era Analytical engine The analytical engine‚ an important step in the history of computers‚ was the design of a mechanical general- purpose computer by the British mathematician Charles Babbage. It was first described in 1837. Because of financial‚ political‚ and legal issues‚ the engine was never built. In its logical design the machine was essentially modern‚ anticipating the first completed general-purpose computers by about 100 years. The input
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EVENT: MEANS THE USER HAS INITIATED AN ACTION THAT CAUSES THE PROGRAM TO PERFORM THE TYPE OF PROCESSESING CALLED FOR BY THE USER’S ACTION. CLASS: IS A NAMED GROUP OF PROGRAM CODE. INSTANCE: A BUTTON CREATED FROM A CLASS IS CALLED AN OBJECT OR SOMETIMES AN INSTANCE OF A CLASS. INSTANTIATION: IN PROGRAMMING TERMINOLOGY‚ THE PROCESS OF CREATING A BUTTON OBJECT FROM THE BUTTON CLASS IS CALLED INSTANTIATION. PROGRAM DEVELOPMENT LIFE CYCLE: 1. GATHER AND ANALYZE THE PROGRAM REQUIREMENTS 2. DESIGN THE
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A History of Computer Programming Languages The first programming languages predate the modern computer. From the first‚ the languages were codes. Herman Hollerith realized that he could encode information on punch cards when he observed that railroad train conductors would encode the appearance of the ticket holders on the train tickets using the position of punched holes on the tickets. Hollerith then proceeded to encode the 1890 census data on punch cards which he made the same size as the boxes
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private JTextField amountField; private JTextField termField; private JTextField rateField; private JTextField mpayField; // Adds the title to the window and defines window diminsions public Mortgage1() { super("PRG/421 Mortgage Calculator"); initComponents(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(275‚ 175); setVisible(true); setResizable(false); setLocationRelativeTo(null); MenuBar mnuBar = new MenuBar(); setMenuBar(mnuBar); Menu
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computer‚ was called machine language or machine code‚ it is the only language a computer really understands‚ a sequence of 0s and 1s that the computer’s controls interprets as instructions‚ electrically. First-generation languages required the writing of long strings of binary numbers to represent such operations as “add‚” “subtract‚” “and compare.” Later improvements allowed octal‚ decimal‚ or hexadecimal representation of the binary strings. 2ND GENERATION (ASSEMBLY LANGUAGE): Because writing programs
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Summary of PL/1 (Programming Languages 1) History (Programming Language 1) A high-level IBM programming language introduced in 1964 with the System/360 series‚ developed by George Radin of IBM in 1964. Originally named (NPL) and Fortran VI. It was designed to combine features of and eventually supplant COBOL and FORTRAN‚ which never happened. A PL/I program is made up of procedures (modules) that can be compiled independently. There is always a main procedure and zero or more additional ones.
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Created using Notebooks by Droid-Veda LLP Jan-31-2013 The data resulted from the experiment shows how there was difference between the average time read between the control group and the experimental group. the experimental group had a word list with conflicting word stimuli‚ causing the there to be a thought processing allowing the participant to read the color of the word rather than the word itself. The thought processing took more time‚ resulting in the experimental group to take a longer time
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CONCEPTS OF PROGRAMING LANGUAGES (COMPUTER SCIENCE 7) PRELIMINARIES Reasons for Studying Concepts of Programming Languages 1. Increased capacity to express ideas – People with limited grasp of natural language are limited in the complexity of their thoughts‚ it is difficult for people to conceptualize structure that they cannot describe‚ verbally or in writing. Programmers in the process of developing software encounter the same constraint. Programmers can increase the range of their software-development
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solving has pushed the development of newer programming languages. The evolution of programming languages is typically discussed in terms of generation of languages. The first generation of Programming languages is machine language‚ which required the use of binary symbols (0s and 1s). Because this is the language of the CPU‚ text file that are translated into binary sets can be read by almost every computer system platform. Developers of programming languages attempted to overcome some of the difficulties
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Technology Structure of Programming Language “C++ Programming Language” INSTRUCTOR: SCLP SUBMITTED BY: UC HISTORY OF C++ In the early 1970s‚ Dennis Ritchie of Bell Laboratories was engaged in a project to develop a new operating system. Ritchie discovered that in order to accomplish his task he needed the use of a programming language that was concise and that produced compact and speedy programs. This need led Ritchie to develop the programming language called C.. In the
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