Compilare: user.cpp: In function ‘int cmp(const nod&, const nod&)’: user.cpp:39:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( pos[ x.sir[i] ] != pos[ y.sir[i] ] ) ^ user.cpp:39:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( pos[ x.sir[i] ] != pos[ y.sir[i] ] ) ^ user.cpp:40:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] return pos[ x.sir[i] ] < pos[ y.sir[i] ]; ^ user.cpp:40:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] return pos[ x.sir[i] ] < pos[ y.sir[i] ]; ^ user.cpp: In function ‘int main()’: user.cpp:56:38: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[6]’ [-Wformat=] scanf("%s\n", &mat[i].sir); ^ user.cpp:59:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] pos[ sir[i] ] = i; ^ user.cpp:48:38: 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:49:40: 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:51:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &p); ^ user.cpp:52:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &N); ^ user.cpp:53:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", sir); ^ user.cpp:56:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", &mat[i].sir); ^