yes
it is predefined function
Not necessary, there is a predefined 'pow' function.
Predefined functions are built-in functions that perform standard operations and that generally do not depend on any classes. A predefined void function is simply a predefined function that has no return value. An example of a predefined void function is the abort() function which typically has the following signature: void abort(void);
No predefined 'header' function in the standard C libraries. There are header files, if that's what you mean.
main is predeclared and user defined.
No. It is a user defined function which the person who is creating the java class has to code by himself.
The main function defines the entry point of an application in C.
Guess you meant: can a recursive function call predefined functions? Answer: sure, why not.
Just as you would do it manually, I mean there is no predefined 'solve_equation' function in C.
That won't happen, you have to have a predefined putpixel (or something like that) function.
Predefined codes or the predefined functions are the codes small or large codes which are predefined by the maker of the language. In C++ the predefined codes can be included in the program by the header files. These codes are placed in files and functions could be used to access them. Like a simple console Code to output "Hello World" uses a predefined code cout
in c main function initailly called by operating system.