![]() A data structure is an assembly of simpler data types into a single record. The next step in the evolution of computer programming languages was the development of structured languages, like C and PASCAL, and the introduction of data structures. It was up to the programmer to keep the arrays aligned for example, to make sure the third element of each array corresponded to the same product. For example, a product database might contain three arrays called Product Number, Product Description, and Product Price. A database was created using a group of arrays. An array is a list of elements that are all the same data type for example, a list of numbers or a list of strings. The only data structure available was the array. A high order language is more portable than an assembly language program the same source file can be compiled for any computer as long as a suitable compiler exists.Įarly high order languages only allowed for simple data types such as integer, floating point number, or string (a sequence of letters). The object file can then be loaded and executed by the computer. A program called a compiler reads the statements from a source file and generates a file containing machine instructions, which is called an object file. One statement in a high order language corresponds to a sentence in English. High Order Languages.Īfter assembly language, higher order languages were developed among the early ones were FORTRAN and BASIC. Although other languages are now used for most computer applications, assembly language is still used today as the first language when a new chip is developed. Assembly language programs are difficult to write, debug, and maintain. Assembly language is specific to a particular type of computer moving the program to a different type of computer requires writing a whole new program. Accomplishing anything useful takes many machine instructions. ![]() This is a primitive type of language in which each statement corresponds to a single machine instruction it is the most basic computer operation possible. The first computer programs were written in assembly language. This evolution is detailed in the following examples. Evolution of Computer Programming LanguagesĬomputer programming languages have evolved continually over the years. ![]() Understanding objects, and object-oriented languages, requires knowledge of the evolution of computer programming languages and data structures. To make it easier to develop, debug, reuse, and maintain software than is possible with earlier languages. An object-oriented language is a computer programming language that revolves around the concept of an object.
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