c++unsigned short 头文件
时间: 2023-09-23 20:12:28 浏览: 48
C语言中,`unsigned short` 是一个无符号短整型数据类型,它占用2个字节(16位)的内存空间。在C语言中,`unsigned short` 的定义是通过包含头文件 `<stdint.h>` 来实现的。
在该头文件中,可以找到 `uint16_t`(即无符号16位整型)的定义。为了使用 `uint16_t` 类型,您需要在文件中包含以下代码:
```c
#include <stdint.h>
```
这个头文件提供了固定大小的整数类型定义,以确保跨平台的一致性。所以,当您需要使用无符号短整型时,可以包含 `<stdint.h>` 头文件并使用 `uint16_t` 类型来声明变量。
相关问题
c++ int 头文件
cint头文件是一个用于处理整数类型的C语言头文件。在C语言中,整数类型是非常基础的数据类型之一。cint头文件中包含了一些预定义的整数类型和与整数相关的宏定义。
cint头文件中定义了一些预定义的整数类型,例如int、unsigned int、short、unsigned short等。这些预定义的整数类型可以在程序中直接使用,而不需要在每次使用时重新定义。
此外,cint头文件中还包含了一些与整数类型相关的宏定义,用于操作和处理整数。例如,MIN_INT表示整型的最小值,MAX_INT表示整型的最大值,INT_SIZE表示整型的字节大小等。
使用cint头文件可以使整数类型的操作更加方便和高效。由于整数类型在计算机程序中经常被使用,因此使用cint头文件可以简化程序的编写,提高代码的可读性和可维护性。
总之,cint头文件提供了一些预定义的整数类型和与整数相关的宏定义,使得整数类型的操作更加方便和高效。使用cint头文件可以简化C语言程序的编写,提高代码的可读性和可维护性。
<iostream>头文件源码
下面是iostream头文件的源码:
```cpp
#ifndef _IOSTREAM_H
#define _IOSTREAM_H
#include <ios> // basic_ios, streampos, streamoff, etc.
#include <streambuf> // basic_streambuf
#include <istream> // basic_istream
#include <ostream> // basic_ostream
#include <cstdio> // EOF, FILE
#include <wchar.h> // wchar_t
namespace std {
extern istream cin; // standard input stream
extern ostream cout; // standard output stream
extern ostream cerr; // standard error (output) stream
extern ostream clog; // standard logging (output) stream
template <class charT, class traits = char_traits<charT>>
class basic_iostream : public basic_ios<charT, traits> {
public:
using char_type = charT;
using int_type = typename traits::int_type;
using pos_type = typename traits::pos_type;
using off_type = typename traits::off_type;
using traits_type = traits;
// constructors
explicit basic_iostream(basic_streambuf<charT, traits>* sb);
virtual ~basic_iostream();
// delete copy and move constructors and assignments
basic_iostream(const basic_iostream&) = delete;
basic_iostream& operator=(const basic_iostream&) = delete;
basic_iostream(basic_iostream&&) = delete;
basic_iostream& operator=(basic_iostream&&) = delete;
// basic_iostream operations
basic_ios<charT, traits>* tie() const;
basic_ios<charT, traits>* tie(basic_ios<charT, traits>* tiestr);
basic_streambuf<charT, traits>* rdbuf() const;
void rdbuf(basic_streambuf<charT, traits>* sb);
// conversions
operator void*() const;
bool operator!() const;
// unformatted input
int_type get();
basic_iostream<charT, traits>& get(char_type& c);
basic_iostream<charT, traits>& get(char_type* s, streamsize n);
basic_iostream<charT, traits>& get(char_type* s, streamsize n, char_type delim);
basic_iostream<charT, traits>& getline(char_type* s, streamsize n);
basic_iostream<charT, traits>& getline(char_type* s, streamsize n, char_type delim);
basic_iostream<charT, traits>& ignore(streamsize n = 1, int_type delim = traits::eof());
basic_iostream<charT, traits>& read(char_type* s, streamsize n);
streamsize readsome(char_type* s, streamsize n);
// unformatted output
basic_iostream<charT, traits>& put(char_type c);
basic_iostream<charT, traits>& write(const char_type* s, streamsize n);
// formatted input
basic_iostream<charT, traits>& operator>>(basic_ios<charT, traits>& (*pf)(basic_ios<charT, traits>&));
basic_iostream<charT, traits>& operator>>(basic_istream<charT, traits>& (*pf)(basic_istream<charT, traits>&));
basic_iostream<charT, traits>& operator>>(basic_streambuf<charT, traits>* sb);
basic_iostream<charT, traits>& operator>>(bool& n);
basic_iostream<charT, traits>& operator>>(short& n);
basic_iostream<charT, traits>& operator>>(unsigned short& n);
basic_iostream<charT, traits>& operator>>(int& n);
basic_iostream<charT, traits>& operator>>(unsigned int& n);
basic_iostream<charT, traits>& operator>>(long& n);
basic_iostream<charT, traits>& operator>>(unsigned long& n);
basic_iostream<charT, traits>& operator>>(long long& n);
basic_iostream<charT, traits>& operator>>(unsigned long long& n);
basic_iostream<charT, traits>& operator>>(float& f);
basic_iostream<charT, traits>& operator>>(double& f);
basic_iostream<charT, traits>& operator>>(long double& f);
basic_iostream<charT, traits>& operator>>(void*& p);
basic_iostream<charT, traits>& operator>>(basic_ios<charT, traits>& (*pf)(basic_ios<charT, traits>&));
basic_iostream<charT, traits>& operator>>(basic_istream<charT, traits>& (*pf)(basic_istream<charT, traits>&));
basic_iostream<charT, traits>& operator>>(basic_streambuf<charT, traits>* sb);
// formatted output
basic_iostream<charT, traits>& operator<<(basic_ios<charT, traits>& (*pf)(basic_ios<charT, traits>&));
basic_iostream<charT, traits>& operator<<(basic_ostream<charT, traits>& (*pf)(basic_ostream<charT, traits>&));
basic_iostream<charT, traits>& operator<<(basic_streambuf<charT, traits>* sb);
basic_iostream<charT, traits>& operator<<(bool n);
basic_iostream<charT, traits>& operator<<(short n);
basic_iostream<charT, traits>& operator<<(unsigned short n);
basic_iostream<charT, traits>& operator<<(int n);
basic_iostream<charT, traits>& operator<<(unsigned int n);
basic_iostream<charT, traits>& operator<<(long n);
basic_iostream<charT, traits>& operator<<(unsigned long n);
basic_iostream<charT, traits>& operator<<(long long n);
basic_iostream<charT, traits>& operator<<(unsigned long long n);
basic_iostream<charT, traits>& operator<<(float f);
basic_iostream<charT, traits>& operator<<(double f);
basic_iostream<charT, traits>& operator<<(long double f);
basic_iostream<charT, traits>& operator<<(const void* p);
basic_iostream<charT, traits>& operator<<(basic_ios<charT, traits>& (*pf)(basic_ios<charT, traits>&));
basic_iostream<charT, traits>& operator<<(basic_ostream<charT, traits>& (*pf)(basic_ostream<charT, traits>&));
basic_iostream<charT, traits>& operator<<(basic_streambuf<charT, traits>* sb);
};
// typedefs
using iostream = basic_iostream<char>;
using wiostream = basic_iostream<wchar_t>;
// manipulators
extern basic_istream<char>& ws(basic_istream<char>& is);
extern basic_istream<wchar_t>& ws(basic_istream<wchar_t>& is);
// object instances
extern istream cin;
extern ostream cout;
extern ostream cerr;
extern ostream clog;
// non-member functions
template <class charT, class traits>
basic_istream<charT, traits>& flush(basic_istream<charT, traits>& is);
template <class charT, class traits>
basic_ostream<charT, traits>& flush(basic_ostream<charT, traits>& os);
template <class charT, class traits>
basic_istream<charT, traits>& ws(basic_istream<charT, traits>& is);
template <class charT, class traits>
void swap(basic_ios<charT, traits>& a, basic_ios<charT, traits>& b) noexcept;
}
#endif /* _IOSTREAM_H */
```
该头文件定义了C++标准输入输出流(cin、cout、cerr、clog)以及基本的输入输出流对象。同时还定义了一系列输入输出的操作符和控制符。
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