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The layout of C Programs


The general form of a C program is as follows:

pre-processor directives
global declarations
main()
{
   local variables to function main ;
   statements associated with function main ;
}
f1()
{
   local variables to function 1 ;
   statements associated with function 1 ;
}
f2()
{
   local variables to function f2 ;
   statements associated with function 2 ;
}
.
.
.
etc

Note the use of the bracket set () and {}. () are used in conjunction with function names whereas {} are used as to delimit the C statements that are associated with that function. Also note the semicolon - yes it is there, but you might have missed it! a semicolon (;) is used to terminate C statements. C is a free format language and long statements can be continued, without truncation, onto the next line. The semicolon informs the C compiler that the end of the statement has been reached. Free format also means that you can add as many spaces as you like to improve the look of your programs.

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