fgets
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header <stdio.h>
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|   char *fgets( char          *str, int count, FILE          *stream );  | 
(until C99) | |
|   char *fgets( char *restrict str, int count, FILE *restrict stream );  | 
(since C99) | |
Reads at most count - 1 characters from the given file stream and stores them in str. The produced character string is always NULL-terminated. Parsing stops if end-of-file occurs or a newline character is found, in which case str will contain that newline character.
[edit] Parameters
| str | - | string to read the characters to | 
| count | - |   the length of str
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| stream | - | file stream to read the data from | 
[edit] Return value
str on success, NULL on an error
[edit] See also
|    reads formatted input from stdin, a file stream or a buffer  (function)  | |
   reads a character string from stdin (function)  | |
|    writes a character string to a file stream  (function)  | |
|   C++ documentation for fgets 
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