vscanf, vfscanf, vsscanf
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在头文件 <stdio.h> 中定义
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int vscanf( const char *format, va_list vlist ); |
(1) | |
int vfscanf( FILE *stream, const char *format, va_list vlist ); |
(2) | |
int vsscanf( const char *buffer, const char *format, va_list vlist ); |
(3) | |
从各种来源中读取数据,解释它根据
format
vlist
所定义的位置,并将结果存储到.原文:
Reads data from the a variety of sources, interprets it according to
format
and stores the results into locations defined by vlist
.1)
从stdin读取数据
2)
读取文件中的数据流
stream
原文:
Reads the data from file stream
stream
3)
null结尾的字符串
buffer
读取数据原文:
Reads the data from null-terminated character string
buffer
目录 |
[编辑] 参数
stream | - | 输入文件流中读取
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buffer | - | 指针指向一个空结束的字符串读取
原文: pointer to a null-terminated character string to read from | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
format | - | 指针指向一个空结束的字符串指定如何读取输入。
格式字符串由空白字符(格式字符串中的任何空白字符消耗所有可用的连续空格字符的输入),非空白字符除了
% (每个这样的格式字符串的字符占用一个相同的字符的输入)转换规范。每个转换规格的格式如下:原文: The format string consists of whitespace characters (any single whitespace character in the format string consumes all available consecutive whitespace characters from the input), non-whitespace characters except % (each such character in the format strings consumes exactly one identical character from the input) and conversion specifications. Each conversion specification has the following format:
下面的格式说明符
原文: The following format specifiers are available:
原文: pointer to a null-terminated character string specifying how to read the input.
格式字符串由空白字符(格式字符串中的任何空白字符消耗所有可用的连续空格字符的输入),非空白字符除了
% (每个这样的格式字符串的字符占用一个相同的字符的输入)转换规范。每个转换规格的格式如下:原文: The format string consists of whitespace characters (any single whitespace character in the format string consumes all available consecutive whitespace characters from the input), non-whitespace characters except % (each such character in the format strings consumes exactly one identical character from the input) and conversion specifications. Each conversion specification has the following format:
下面的格式说明符
原文: The following format specifiers are available:
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vlist | - | 可变参数列表,其中包含接收的参数
原文: variable argument list containing the receiving arguments |
[编辑] 返回值
成功读取的参数个数,或EOF如果发生故障.
原文:
Number of arguments successfully read, or EOF if failure occurs.
[编辑] 示例
本章尚未完成 原因:暂无示例 |
[编辑] 另请参阅
stdin,文件流或缓冲区的读取格式的输入 原文: reads formatted input from stdin, a file stream or a buffer (函数) | |
打印格式化的输出stdout,一个文件流或buffer 使用可变参数列表 原文: prints formatted output to stdout, a file stream or a buffer using variable argument list (函数) | |
C++ documentation for vscanf, vfscanf, vsscanf
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