STD(C 语言命令)

基本信息

名称STD

属于一个C++语言命令

1

基本介绍

标准（Standard)

在C++中

std其实就是standard标准的意思~~

例如std::cin就是标准输入

std::cout就是标准输出的意思~:)

一个标准库名字空间

The std namespace

The ANSI/ISO C++ standard requires you to explicitly declare the namespace in the standard library. For example,when using iostream.h,you do not have to specify the namespace of cout in one of the following ways:

std::cout (explicitly)

using std::cout (using declaration)

using namespace std (using directive)

Visual C++ continues to support the use of older header filenames with the .h extension. Such usage does not require invocation of the std namespace described above.