Compilare: user.cpp: In function ‘void solve(int (*)[1010][4], int, int)’: user.cpp:38:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] vaz[aux.x][aux.y][aux.dir]=0; ^ user.cpp:43:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(d[x][y][i]>d[aux.x][aux.y][aux.dir]+(aux.dir!=i)) ^ user.cpp:45:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[x][y][i]=d[aux.x][aux.y][aux.dir]+(aux.dir!=i); ^ user.cpp: In function ‘int main()’: user.cpp:58:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.in", "r", stdin); ^ user.cpp:59:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.out", "w", stdout); ^ user.cpp:61:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:64:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ user.cpp:65:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(sir); ^ user.cpp:72:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&x1,&y1,&x2,&y2); ^ /tmp/cc5BkKL8.o: In function `main': user.cpp:(.text.startup+0xa1): warning: the `gets' function is dangerous and should not be used.