Compilare: user.cpp: In function ‘int main()’: user.cpp:43:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] coord.x += dx[d]; ^ user.cpp:44:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] coord.y += dy[d]; ^ user.cpp:66:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] val += (coord.y - (coord.y + dy[d])) * coord.x; ^ user.cpp:11:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ape.in","r",stdin); ^ user.cpp:12:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ape.out","w",stdout); ^ user.cpp:18:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &P); ^ user.cpp:42:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &d); ^