The integer value that the main function returns to the operating system is called the ______ .
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During the compilation phase, a C++ source program is processed first by the ______ program and then by the compiler.
In C++ systems, names appearing in #include directives are called ______ files.
In C++, the phrase "standard output device" usually refers to what?()
A. the keyboard
B. a floppy disk drive
C. the display screen
D. a CD-ROM drive
E. none of the above
In a C++ function, the statements enclosed by a { } pair are known as the ______ of the function.