Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:24:9: warning: unused variable ‘i’ [-Wunused-variable] int i,p=List[node],neighbour; ^ user.cpp: In function ‘void anti_dfs(int)’: user.cpp:36:9: warning: unused variable ‘i’ [-Wunused-variable] int i,p=List0[node],neighbour; ^ user.cpp: In function ‘void read(int&)’: user.cpp:56:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,DIM,stdin); ^ user.cpp:64:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,DIM,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:70:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.in","r",stdin); ^ user.cpp:71:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.out","w",stdout); ^