... areautomatically defined for a program by the local operating system. The next step is to write a program that accesses a file that is not already connected to the program. One program that illustrates ... emphasizes the logical structure of the program. Although Ccompilers do not care about how a program looks, proper indentation and spacing are criticalin making programs easy for people to read. ... output file. We included the program name, from argv[0], in the message, so if this program is used with others, the source of an error is identified. Second, the program uses the standard library...