C语言 scanf() 和 fscanf() 之间有什么区别？
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what are the differences between scanf() and fscanf()?
提问by phpNewComer
what are the differences between scanf() and fscanf()?
scanf() 和 fscanf() 之间有什么区别？
thanks
谢谢
回答by caf
scanf()is exactly identical to fscanf()with stdinas the first argument.
scanf()fscanf()与stdin第一个参数完全相同。
回答by Gustav Larsson
For scanf()you always read from standard input and for fscanf()you specify the file input stream.
因为scanf()您总是从标准输入中读取并为fscanf()您指定文件输入流。
Compare:
相比：
int scanf ( const char * format, ... );
int fscanf ( FILE * stream, const char * format, ... );
回答by configurator
Just google it (emphasis mine):
只需谷歌一下（强调我的）：
http://www.cplusplus.com/reference/clibrary/cstdio/scanf/
int scanf ( const char * format, ... );Read formatted data from stdin
http://www.cplusplus.com/reference/clibrary/cstdio/scanf/
int scanf ( const char * format, ... );从标准输入读取格式化数据
And
和
http://www.cplusplus.com/reference/clibrary/cstdio/fscanf/
int fscanf ( FILE * stream, const char * format, ... );Read formatted data from stream
http://www.cplusplus.com/reference/clibrary/cstdio/fscanf/
int fscanf ( FILE * stream, const char * format, ... );从流中读取格式化数据
回答by sarnold
From the third paragraph of fscanf(3)manpage:
从fscanf(3)联机帮助页的第三段：
The scanf() function reads input from the standard input stream
stdin, fscanf() reads input from the stream pointer stream, and
sscanf() reads its input from the character string pointed to by
str.
You might have been able to guess that from the SYNOPSIS:
您可能已经能够从以下内容中猜到SYNOPSIS：
int scanf(const char *format, ...);
int fscanf(FILE *stream, const char *format, ...);
:)
:)
回答by Saravana
scanf() : data transfer from I/O to memory(variables) fscanf() : data transfer form memory(variables) to file.
scanf() ：从 I/O 到内存（变量）的数据传输 fscanf() ：从内存（变量）到文件的数据传输。
