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Yes, there can be friend functions in C++.
C++ built-in functions are those functions that are provided for you as part of the language itself, and includes all of the C standard library functions (all of which were inherited from C) and is expanded upon by the C++ standard template library. C++ implementors may provide additional functions that are platform-specific, however these are not considered built-in functions becuase C++ is a cross-platform language. These are best described as 3rd party functions. The functions you yourself write are known as user-defined functions.
C programs do not function without functions.
No, because C does not support the concept of template functions. Template functions only exist in C++, never in C.
Not possible in C, only in C++
could you be clear? what kind of functions you are asking? functions available in C, C++, java ? in C you can use mod() function or "%" operator to find the parities.
she discovered the people -----------> jowkiss ... :P
Impossibility.
The header file for random functions ( like rand(), srand() ) is stdlib.h in C and cstdlib in C++.
Of course they are used. Both stand-alone and class-member functions are used in C++.
C date and time functions refer to a group of functions in the standard library of the C programming language that implements time and date operations like conversion between date formats.