Compilare: user.cpp: In function ‘int main()’: user.cpp:19:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] reg[x][y]++; ^ user.cpp:19:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] reg[x][y]++; ^ user.cpp:20:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] reg[y][x]++; ^ user.cpp:20:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] reg[y][x]++; ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv.in","r",stdin); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv.out","w",stdout); ^ user.cpp:15:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:18:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n%c %c",&x,&y); ^