No predefined 'header' function in the standard C libraries. There are header files, if that's what you mean.
Platform dependent, possibly LIBC.LIB or something like that.
list of header files in c and function prototype associated with each file
Include the header file math.h and use the function acos(d)
int86 is a function in TurboC, header dos.h, consult the built-in help.
Constants, typedefs, function prototypes. If you want to know more, load it into a text editor.
to include the header files.
There are no 'sections' in C source, you can define functions anywhere, except inside another function or variable/type definition.
You need to #include the header file that contains the missing function's declaration.
Header File in C/C++ are the files which contains the definition of the pre-defined functions, data-types & constants, etc. By adding the header file you reduce your job of defining the same functions which are defined earlier by someone else & you can use those functions/data-types easily.
it is sqrt in header math.h
It's 1405 in my Linux box.
All function interfaces must be declared before they can be used. This is known as a forward declaration and is strictly enforced in C++ (but not in C). To facilitate this, interfaces are typically placed in a header file which can then be included in every source file that requires access to that function. The interface need not be defined (implemented) in the header unless the function is a template function. Typically, implementations are kept separate from interfaces (template function implementations are kept in the header but typically separated from the interface) since the interface contains everything the user needs to know in order to make use of the function.
COUT is an inbuilt function in c++ language. Cout is used to print something on to the standard output.
The scanf() function in the <stdio.h> C standard library header.
There is a function called pow in header math.h
The Standard Librarary Function in C is printf,scanf inf Standard input output header.. which is stdio.h.
Look for typedef in it, but I don't think you will find any.
Not part of the standard C-library, so you have to contact its developer.
A haeder is a text-file, meant to include (#include) into a source-file. Usually it contains variable and function declarations, constants, type-definitions, documentation.
The c language does not have template functions. That is a c++ thing.