Compilare: user.cpp: In function ‘int main()’: user.cpp:10:13: warning: variable ‘brackets’ set but not used [-Wunused-but-set-variable] char c, brackets[5000]; ^ user.cpp:8:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &N); ^ user.cpp:13:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &c); ^