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Non-Compliant Code Example
The header <stdio.h> defines the BUFSIZ macro which expands to an integer constant expression that is the size of the buffer used by the setbuf() function. This non-compliant code example defeats the purpose of defining BUFSIZ as a constant by assuming its value in the following expression:
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#include <stdio.h>
/* ... */
nblocks = nbytes >> 9; /* hard to modify, uses "magic number" */
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This compliant solution uses the identifier assigned to the constant value in the expression.
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#include <stdio.h>
/* ... */
nblocks = nbytes / BUFSIZ;
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