Borderou de evaluare (job #406527)

Eroare de compilare: user.c: In function ‘get_combinations_of_books’: user.c:17:9: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:17:9: note: use option -std=c99 or -std=gnu99 to compile your code user.c:19:17: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c: In function ‘read_array_from_file’: user.c:45:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c: In function ‘main’: user.c:60:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c: In function ‘read_array_from_file’: user.c:46:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]