C include stdio h is there anything else to write for me!

include: This header file declares the basic services required for all IO operations, i.e., the input and output operations that support the stream, e.g. cin and cout in the program

include: This header file describes how to control the output format of the data, such as setting the number system, filling characters, precision, data width, etc., such as using setw(), setfill(), setprecision(), etc.

include is a character channeling function.

include program.

include program, you need to use the library functions provided by the C language system, the gets and puts functions.

This is the header file.

The type of function definition varies depending on the programming.

It is often necessary to call different header files.

There are many specific ones.

Appendix is usually found at the end of the textbook.

There are usually pages.

is a header file of c that contains a declaration of the function you are using.

Because there are a lot of them! I'll just talk about the commonly used ones.

include is an input-output function for c, but can be omitted for use in C++.

include is a math function, for example you have to add this header file if you want to use the squar() function.

include is a character channeling function.

include Hehe, this one is a bit forgotten, it's been a long time since it's been useful, I'm sorry.

Anyway, these are commonly used, and there are many, many others, hehe, you can read the next few pages of the book are introduced! ~

If you don't know what the header file is corresponding to this function, you can move the cursor to the function name and press Ctrl+F1 when you get on the machine.

CSTDIO is to represent the content in the form of a header file in C++.

include is a computer term that refers to the Include Header command in C++, which is used to embed a specified header file in a source file. include is generally used in the compilation environment of C, C++ and other languages (that is, in the programming of programming software), to put it bluntly, it tells you that in this place, you have to insert a bunch of **, this bunch** in another file.

For example: include This means that in this place of **, it is equivalent to putting ** in the file in this place. Punching the "<> angle brackets means that this file is a file that is standard with the programming environment, and you can find this file in the default standard place.

CSTDIO is to represent the content in the form of a header file in C++.

It's the old-fashioned C, C++ header file, CSTDIO is the standard C++ (STL), and the functions in CSTDIO are defined in a namespace std.

If you want to call a function for this namespace, you must add std:: or declare use namespace std in the file

include is one of the C precompiled commands.

include is not a C keyword. The include that starts with is a precompile command, i.e. it does not take effect during runtime, but at compile time.

The effect of include is to put the contents of the included file in the corresponding position of the compiled C file at compile time.

2. It is one of the header files of the C language library file, which contains the commonly used standard input and output.

For example, printf, scanf, etc. are all in it.

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include and main can't be written on a single line, they should be written like this:

#include

main()

main is the entry function.

The number of functions is the return type, the name of the function, and the body of the function.

You're significantly missing a function return type.

Answer: 7 8 9

Procedure: This question examines static local variables The static local variables with static are not released after the function is called (because the memory of the static modified local variables is allocated in the global area (also called the static area), and the memory of the local variables not modified with the static keyword is allocated in the stack area (the life cycle of the stack is after the end of the function)), because c is modified by the static keyword, so the next time you enter this function, the value of c is after the last modification. However, ordinary local variables, such as question b, release memory after each call, and the next call is initialized to the initial value.

in the main function.

The first call to the f(a) f function returns a value of 7 for the variables b = 1, c = 4, a = 2

The second call to f(a) The variables in the f function b = 1, c = 5 (static local variables) a = 2 return a value of 8

The third call to f(a) The variables in the f function b = 1, c = 6 (static local variables) a = 2 return a value of 9

Whitespace problem if the output function of the main function is printf("%d", f(a));Then there is no space if the output function of the main function is printf("%d ", f(a));then there is a space (note the difference, there is a space after %d).

cstdio is to express the content du in the form of a c++ header zhi piece.

It's the old-fashioned C, C++ header file, Cstdio is the standard C++ (STL), and the functions in Cstdio.

Numbers are defined in a namespace std.

If you want to call a function for this namespace, you must add std:: or declare use namespace std in the file

CSTDIO is a header file in the form of a baic++ header file, which is a header file in the C standard library, that is, it provides basic text input and output stream operations (including screens and files, etc.). Since C does not provide keywords dedicated to text input and output, this library is the most common C program loading library.

There is a difference between cstdio and , they are not the same file.

It is the previous C and C++ header file, CSTDIO is the standard C++ (STL), and the functions in CSTDIO are defined in a namespace std, if you want to call the functions of this namespace, you must add std:: or declare using namespace std in the file.

#include

usingnamespace std;You can also add this statement as well

Hello. In the new C++ standard, generate new headers.

The method is simply to add the existing C++ header file name to the filename. h removed. For example, it became the genus < iostream> became, and so on.

For C headers, do the same, but add a C before each name. So the c's became, became< cstdio>, and so on. Standard C-header files continue to be supported as such.

The contents of the header file are not in the std.

The new C++ header file with the C library feature has a name like this. They provide the same content as the corresponding old C header file, except that the content is in STD.

You don't need to know that much, there's a universal library here.

#include