printf, fgets, strlen, malloc etc
No.
String library function is one which is used to perform an operation in C-programming,without which library functions likestrlen(),strcp(),strcmp(),strdup(),strrev(),etc..,.can be performed
Library Function Starting out with Programming Logic and Design by Tony Gaddis Page 218
The C language supports whatever functionality is provided by the applicable library, by the programmer, and by the input/output capabilities of the platform. Since a network programming library is available to the c compiler, then yes, the c language supports network programming.
There are no commands in C-programming, you should use function sqrt from math.h
libray in c++
Sizeof is an example.
The memcpy library is used in computer programming to copy the value of numbers from a source to the memory block destination. Memcpy is frequently used in the C++ programming language.
What do you mean by stack-refreshing? Anyway, there are no stack handling functions in the standard C library.
... are important to know. ... can be found in the manuals.
Well, it depends on what you mean by the type of a function. There are user defined functions and library functions.
C does not define a setpixel() function; it is a non-standard function. C is intended for general-purpose programming but graphics handling is system-specific. There are third-party libraries available to cater for graphics handling (many of which are generic) but without knowing which library you are using nor on which platform, it would be impossible to demonstrate a setpixel() function in any meaningful way. Best advice is to consult the documentation that came with your graphics library.