高级语言简介(国外英文资料).docVIP

高级语言简介(国外英文资料) The computer high-level language, at present popular is Java, VB, VC, FoxPro, Delphi and so on The high-level language is compared to the vast majority of programmers choose an assembly language, it not only many related machine instructions into a single instruction and removed and the specific operation and complete the work related but irrelevant details, such as the use of the stack and registers, which greatly simplifies the program instructions. At the same time, programmers do not need much specialized knowledge because they omit many details. A high-level language is mainly relative to the assembly language, and it is not specific to a particular language, but includes many programming languages, such as the popular VB, VC, FoxPro, Delphi etc., the language grammar, the command format is different. Preparation of a high-level language program is not directly computer recognition, must be converted to be carried out, according to the way of conversion can be divided into two groups to perform in a similar way to explain in our daily life, simultaneous translation application source code while the corresponding language interpreter translated into object code (machine language). While performing, so the efficiency is relatively low, and can not generate independently execute the executable file, the application can not be separated from the interpreter, but this way is flexible and can dynamically adjust and modify the application program. The compiler compiler refers to the application source program execution is the source code will be translated into target code (machine language), so the target program can be separated from its language independent execution, more convenient and more efficient use of. However, once the application needs to be modified, you must first modify the source code, and then recompile the new target file (*.Obj) to execute, only the target file without the source code, it is very inconvenient to modify. Now most of t