Compilare: user.cpp: In function ‘int main()’: user.cpp:61:7: warning: unused variable ‘k’ [-Wunused-variable] int k = 0; ^ user.cpp:57:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("spider.in", "r", stdin); ^ user.cpp:58:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("spider.out", "w", stdout); ^ user.cpp:60:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:65:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp: In function ‘int dfs(int, int, int)’: user.cpp:51:71: warning: ‘aux’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][y][dir] += dfs(x + dirLin[nextDir], y + dirCol[nextDir], aux); ^ user.cpp: In function ‘int main()’: user.cpp:116:7: warning: ‘aux’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (i == aux) ^