Compilare: user.cpp: In function ‘int main()’: user.cpp:17:11: warning: unused variable ‘pos’ [-Wunused-variable] char* pos; ^ user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%hd\n", &k); ^ user.cpp:19:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(input, 100001, fin); ^