preprocessor directives
what are the two most common directives
#include, #define
what is the result of kms = KMS_PER_MILE
...
what can a C program expand
a C program may expand the number of operations available by supplying additional libraries
what does a preprocessor begin with
a preprocessor begins with a number symbol ( #) as it is the first non blanc character
what can an individual programmer create
a programmer can create libraries of functions
what does a library standard header file end with
each file name ends with the symbol .h
the other preprocessor directive #define does what
it associates the constant macro KMS_PER_MILE with the meaning 1.609
what does a library have
it has a standard header file
what does this directive do
it instructs the preprocessor to replace each occurence of KMS_PER_MILE in the text of the C program by 1.609 before the compilation begins.
what is a library
it is a collection of useful functions and symbols that may be accessed by a program
what is a constant macro
it is a name that is replaced by a particular constant value before the program is sent to the compiler
what is the preprocessor
it is a system program that modifies a C program prior to its compilation
what does a preprocessor do
it modifies the text of a C program before it is compiled
what does the #include <stdio.h> directive notify
it notifies the preprocessor that some names used in the program (such as scanf and printf) are found in the standard header file <stdio.h>
what gives a program access to a library
the #include directive gives a program access to a library
how many parts does the C program have
the C program has two parts
what are the two parts ot the C parts
the preprocessor directives and the main function
what are the preprocessor directives
they are commands that give instructions to the C preprocessor
what does this directive cause
this directive causes the preprocessor to insert from a standard header file into a program before compilation.
