Computers can deal with different kinds of problems if they a given the right instructions for what to do. Instructions are first written in one of the high-level languages, e.g. FORTRAN, coBOL, ALGOL, PL/1, PASCAL or BASIC, depending the type of problem to be solved. A program written in one of these languages if often called a source program, and it cannot be directly processed by the computer until it has been compiled, which means interpreted into machine code. Usually instruction written in a high- level a single language, when transformed into machine code, results in several instructions. Here is a brief destructionn of the many high-level language. FORTRAN - acronym for Formula Translation. This language is used for solving scientific and mathematical problems. It consists of algebrai formulae and English phrases. It was first introduced in the United States in 1954.COBOL acronym for Common Business - Oriented Language. This language is used for commercial purposes. COBOL, which is written using English statements, deals with problems that do not involve a lot mathematic calculations. It was first introduced in 1959.ALGOL - acronym for Algorithmic Language. Originally called IAL, which means International Algebraic Language. It is used for mathematical and scientific purposes. ALGOL was first introduced in Europe in 1960.PL/I- Programming Language 1. Developed in 1964 to combine features of COBOL and ALGOL. Consequently, it is used for data as well as scientific applications.基本结构-初学者通用符号指令码的首字母缩写。在需要一种简单的语言来开始编程的学生使用的美国达特茅斯学院在 1965 年开发其他这种语言是 APL (1962 年开发) 和帕斯卡 (Blaise Pascal 命名和开发在 1971 年)
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