#include
Include the header file math.h and use the function acos(d)
Constants, typedefs, function prototypes. If you want to know more, load it into a text editor.
Platform dependent, possibly LIBC.LIB or something like that.
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.
The scanf() function in the <stdio.h> C standard library header.
No predefined 'header' function in the standard C libraries. There are header files, if that's what you mean.
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.
You need to #include the header file that contains the missing function's declaration.
Platform dependent, possibly LIBC.LIB or something like that.
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.
The scanf() function in the <stdio.h> C standard library header.