Compilare: user.cpp: In function ‘int verificare(int, int)’: user.cpp:21:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr2[a[l2][i]]++; ^ user.cpp:22:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!fr2[a[l2][i]]) ^ user.cpp:16:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k=0; ^ user.cpp: In function ‘int main()’: user.cpp:65:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!fr[l][a[l][i]]) ^ user.cpp:67:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[l][a[l][i]]=-1; ^ user.cpp:36:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d\n",&p,&n); ^ user.cpp:41:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,5002,f); ^ user.cpp:60:31: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(a[l],5002,f); ^