fscanf Reviews

　　For a long time did not touch the C language. From now on, we should begin to brush the subject.

（1）int fscanf( FILE* stream, const char* format, ... );

 

https://www.programiz.com/cpp-programming/library-function/cstdio/fscanf

 

(2) strlen (). Header <string.h>

char c[]={'p','r','\0'}

strlen (c) is a 2, '\ 0' will not be included.