Q: – What are the stream files?
We can open file in C with using stream files.which are identified with a pointer to a FILE structure, or as low-level files, which are identified with an integer handle.
We can open stream files with using one of the following functions.
fopen(): Opens the specified file with the specified mode freopen(): Closes the file specified, then opens a new file as specified fdopen(): Opens a duplicate stream file for an already open low-level file
Q: – How do you remove a macro name?
By using the #undef directive with a macro name, that macro name can be removed, or “undefined.”
Q: – Why do you need the #endif directive?
The #endif directive is used with an #if, #ifdef, or #ifndef directives because statements under the control of a conditional preprocessor directive are not enclosed in braces ({ and }). Therefore, #endif must be used to mark the end of the block of statements.
Q: – How the processor registers can be used in C?
using keyword register we can use the process register in C.Basically process register is used to store variables those i want to access frequently.if these registers are not used in any other program,then those registers we used to allocate memory these variables.
Q: – Why do you need to use the typedef keyword?
By using the typedef keyword, you can define your own names to represent the data types in C.
Q: – Can you redirect a standard stream to a disk file?
Yes. With the help of the freopen() function, you can redirect a standard stream and associate the stream with a disk file.
Q: – Can the conditional expression following the #if directive be an arithmetic expression?
Yes
Q: – Is the C preprocessor part of the C compiler?
No
Q: – What is difference between visual c++ & ANSI c++ ?
Visual C++ is probably the most popular favored compiler, because of it's history of quality and stablity.But in ANSI C++ is a less popular, but is a much more powerful and robust compiler. The IDE is also a lot more powerful than MSVC.
Submitted By:-Rohit Kumar Email-ID: – rohitkumar1372@yahoo.in
