Compilare: user.cpp: In member function ‘bool nod::operator<(const nod&) const’: user.cpp:21:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( pos[ sir[i] ] != pos[ y.sir[i] ] ) ^ user.cpp:21:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( pos[ sir[i] ] != pos[ y.sir[i] ] ) ^ user.cpp:22:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] return pos[ sir[i] ] < pos[ y.sir[i] ]; ^ user.cpp:22:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] return pos[ sir[i] ] < pos[ y.sir[i] ]; ^ user.cpp: In function ‘int main()’: user.cpp:52:34: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[6]’ [-Wformat=] scanf("%s\n", &mat[i].sir); ^ user.cpp:55:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] pos[ sir[i] ] = i; ^ user.cpp:44:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zimeria.in", "r", stdin); ^ user.cpp:45:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zimeria.out", "w", stdout); ^ user.cpp:47:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &p); ^ user.cpp:48:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &N); ^ user.cpp:49:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", sir); ^ user.cpp:52:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", &mat[i].sir); ^