c語言中英文翻譯資料-在線瀏覽
2024-10-04 11:28本頁面
【正文】 983, the American National Standard Institute (ANSI) established a mittee to provide a modern, prehensive definition of C. The resulting definition, the ANSI standard, or “ANSI C”, was pleted late in 1988. Most of the features of the standard are already supported by modern pilers . The standard is based on the original C reference manual. The language is relatively little changed。 the definition syntax changes to match. This extra information makes it much easier for piler to detect errors caused by mismatched arguments. This has proved to be a very useful addition to the language.A second significant contribution of the standard is the definition of a library to acpany C. It specifies functions for accessing the operating system (for example, to read and write file), formatted input and output, memory allocation, string manipulation, and the like. A collection of standard headers provides uniform access to declarations of functions and data types. Programs that use this library is closely modeled on the “standard I/O library” of the UNIX system.Although C matches the capability of many puters, it is independent of any particular machine architecture. With a little care it is easy to write portable programs, that is, programs that can be run without change on a variety of hardware.C, however, like any other language, has its blemishes. Some of the operators have the wrong precedence。main (){ j=1。 i=VALUE。printf (“The factorial of %d is %d\n”, VALUE, j )。 line, which announces the properties (in this case, integer) of the two variables. Other mon variable types are float(for real number) and char (for characters), both of which you can declare in the same way as int.The line main() declares the main function. Every C program must have a function named main somewhere in the code, which marks the beginning of your program. In C, the statements of a function are enclosed in braces{}. In the example the main()function contains only three statement, which are an assignment statement, a for statement, and a printf statement.The printf statement in C is easier to use. The portion in double quotes is called the format string and describes how the data is to be formatted when printed. The format string contains string literals (or string constant) such as The factorial of, \n (also called escape sequence. /n stands for carriage returns), and operators in the form of %d, which are used as placeholders for variables. The two operators(also called conversion specifications) in the format string indicate that integer values found later in the parameter list are to be placed into the string at these points. Other operators include %f for floating po
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