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+.NH 1
+Introduction
+.PP
+C [1][2] is a dangerous programming language.
+The programmer is allowed to do almost anything, as long as
+the syntax of the program is correct.
+This has a reason. In this way it is possible to make a fast
+compiler which produces fast code.
+The compiler will be fast because it doesn't do much checking
+at compile time.
+The code is fast because the compiler doesn't generate run time
+checks.
+The programmer should protect himself against producing error
+prone code.
+One way to do that is to obey the
+.I
+Ten Commandments for C programmers
+.R
+[appendix B].
+This document describes an implementation of the
+.I lint
+program, as referred to in Commandment 1.
+It is a common error to run
+.I lint
+only after a few hours of debugging and some
+bug can't be found.
+.I Lint
+should be run when large pieces of new code are accepted by the
+compiler and as soon as bugs arise.
+Even for working programs it is useful to run
+.I lint,
+because it can find constructions that may lead to problems in 
+the future.
+.bp