<div>
preprocessor directives like<br />
#line # 35 &quot;/usr/include/iso/stdio_is<wbr />o.h&quot; <br />
are typically inerted int generated or preprocessed C code to set the presumed line number and source file.<br />
This can be useful so that error messages or macros that use __FILE__ or __LINE can tell you where the original code that genrerated the error came from<br />
<br />
#define _SYS_VA_LIST_H <br />
defines a preprocessor macro named _SYS_VA_LIST_H<br />
<br />
pragmas cause the impementation to behave in an implementation-defined manner
</div>


preprocessor directives like
#line # 35 "/usr/include/iso/stdio_iso.h"
are typically inerted int generated or preprocessed C code to set the presumed line number and source file.
This can be useful so that error messages or macros that use __FILE__ or __LINE can tell you where the original code that genrerated the error came from

#define _SYS_VA_LIST_H
defines a preprocessor macro named _SYS_VA_LIST_H

pragmas cause the impementation to behave in an implementation-defined manner

<div>
<br />
Can u please explain me the above lines with a small example.<br />
<br />
Also, What exactly the 4th point says?What it is trying to do?<br />
<br />
<br />
<br />

</div>



Can u please explain me the above lines with a small example.

Also, What exactly the 4th point says?What it is trying to do?





<div>
<div class="content wysiwyg-content">
Can anyone help me to explain me the following code snippets.I am bit confused <br />
<br />
1) # 35 &quot;/usr/include/iso/stdio_is<wbr />o.h&quot; 2 3<br />
<br />
2) # 1 &quot;/usr/include/sys/va_list.<wbr />h&quot; 1 3<br />
<br />
<br />
3) #define _SYS_VA_LIST_H<br />
<br />
*4) #pragma ident &nbsp; &quot;@(#)va_list.h &nbsp;1.12 &nbsp; &nbsp;99/05/04 SMI&quot;<br />

</div>
</div>


Can anyone help me to explain me the following code snippets.I am bit confused 

1) # 35 "/usr/include/iso/stdio_iso.h" 2 3

2) # 1 "/usr/include/sys/va_list.h" 1 3


3) #define _SYS_VA_LIST_H

*4) #pragma ident   "@(#)va_list.h  1.12    99/05/04 SMI"


Can anyone help me to explain me the following code snippets.

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.