Compilare: user.cpp: In function ‘int main()’: user.cpp:203:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] x = x + dirx[ch]*v; ^ user.cpp:204:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] y = y + diry[ch]*v; ^ user.cpp:153:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zc.in","r",stdin); ^ user.cpp:154:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zc.out","w",stdout); ^ user.cpp:159:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&N,&M); ^ user.cpp:163:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&x,&y); ^ user.cpp:196:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c %d\n",&ch,&v); ^