PROGRAM DEVELOPMENT

PROGRAM DEVELOPMENT

1. IS

   • the process of getting a program running involves various activities

2. contains five main parts

   • development environments
     • editors,compilers, and interpreters
       • programming language levels
         • categorized in four groups
           • machine language
             • expressed as a series of binary codes and is extremely difficult for humans to read and write
           • high level languages
             • is expressed in phrases in English and is easier to read and this written program, similar to algebraic expressions
           • fourth generation languages
             • also called 4GLs, uses the above three languages
           • assembly language
             • renplaza binary digits by mnemonic,short english-like words that represent commands or data is most easier programers
       • compilers
         • editor
           • used an editor as you type a program into a computer and store it an file, translate program into executable form and execute program and evaluate results.
         • interpreters
           • an interpreter is similar a to compiler but has an important difference. an interpreste interweaves the traslation and execution activities
             • one advantage of this technique is that it eliminates the need for separate compilation pase
         • moved the code from one language to another language, the original code is called source code and the lenguage into which it is translated is called target language
     • sintax and semantics
       • errors
         • kinds of errors as you development programs
           • logical error
             • in this case, the software compiles and executes without complaint, but it produces incorrect results.
           • run time error
             • occurs during program execution, casusas the program to terminate normally
           • compile time error
             • error when compiling or language is not allowed meaningfully
       • sintax
         • are the rules of a language dedicated vocabulary of language elements that can be convinado by statements
       • semantics
         • define what will happen when taht statement is execyted
     • used to create , test and modify a program
       • integrated development environments,
         • integrate various tools into one software program
           • java software develoment
           • java develoment kit
         • debugger