Compilare: user.cpp: In function ‘int main()’: user.cpp:34:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] int pos = Nl[W[i][1]][j]; ^ user.cpp:38:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] pos = Nl[W[i][k]][pos+1]; ^ user.cpp:13:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("mesaj.in" ,"r", stdin ); ^ user.cpp:14:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("mesaj.out","w", stdout); ^ user.cpp:16:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &M, &N); ^ user.cpp:17:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%s", S + 1); ^ user.cpp:30:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%s", W[i] + 1); ^