Compilare: user.cpp: In function ‘int main()’: user.cpp:22:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[c]++; ^ user.cpp:15:7: warning: unused variable ‘n’ [-Wunused-variable] int n, k, i, nr, poz, gr, modif, gr1, poz1, nrgr1, nrgr2, ans, ok, q; ^ user.cpp:15:41: warning: variable ‘poz1’ set but not used [-Wunused-but-set-variable] int n, k, i, nr, poz, gr, modif, gr1, poz1, nrgr1, nrgr2, ans, ok, q; ^ user.cpp:17:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &k, &q); ^ user.cpp:25:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &nr); ^