Yes. Without prototypes you must ensure all definitions are declared forward of their usage. This isn't always possible. Separating the prototypes from the definitions means you can #include the prototypes forward of their usage, and place the actual definitions anywhere you like.
Constants, typedefs, function prototypes. If you want to know more, load it into a text editor.
The .cpp extension is merely conventional; it is not required by the C++ standard. You can actually use any file extension you wish.
A prototype in C is the declaration of a function. Without a prototype, the function cannot be called because the compiler would have no way of knowing if the function was being called correctly. Prototypes may appear in multiple translation units but can only be defined once. A definition is itself a prototype.
The only difference is that C does not use nor require prototypes. C++ does because all functions and types must at least be declared, if not defined, before they can be used.
C++ first appeared in 1983.
for c language it is .c and for c++ it is .cpp
find . -iname '*.c' -o -iname '*.cpp'
Not necessary, there is a predefined 'pow' function.
function-prototypes, type void, enumeration, type-modifier const -- just to name a few
Constants, typedefs, function prototypes. If you want to know more, load it into a text editor.
The extension of a file containing a C program can be any extension, so long as the compiler or platform can infer the proper rules to build it. Commonly, for C programs, the extension is .c, so myfile.c would be a C program. The term cpp is not a designation for C++. It means C Program Precompiler, and it is the normal way to build one or more C programs into an executable. Over the years, cpp has evolved into being able to handle all sorts of languages. C++ is one of them. Typical extensions for C++ programs are .cc, .cpp, and .cxx.
All C++ source code is is a text file with the .cpp extension. So if you save your code as *****.cpp then it is automatically C++ source code.
The .cpp extension is merely conventional; it is not required by the C++ standard. You can actually use any file extension you wish.
A prototype in C is the declaration of a function. Without a prototype, the function cannot be called because the compiler would have no way of knowing if the function was being called correctly. Prototypes may appear in multiple translation units but can only be defined once. A definition is itself a prototype.
The only difference is that C does not use nor require prototypes. C++ does because all functions and types must at least be declared, if not defined, before they can be used.
That is possible. Try it.
C++ first appeared in 1983.