Compilare: user.cpp: In function ‘int main()’: user.cpp:37:15: warning: statement has no effect [-Wunused-value] for (j; j >= 1; j--) ^ user.cpp:13:24: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int i, j, poz, ct, nr = 0, d, aux; ^ user.cpp:13:32: warning: unused variable ‘d’ [-Wunused-variable] int i, j, poz, ct, nr = 0, d, aux; ^ user.cpp:14:10: warning: unused variable ‘flag’ [-Wunused-variable] bool flag; ^ user.cpp:12:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d\n", &n); ^