Compilare: user.cpp: In function ‘void MakeGraph(int, int, int, int, int, int&, int&)’: user.cpp:130:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < onLine[i].size(); j++) { ^ user.cpp: In function ‘void AStar(int, int)’: user.cpp:138:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes.size(); i++) ^ user.cpp: In function ‘char Advance()’: user.cpp:27:38: 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, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:160:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tramvai.in", "r", stdin); ^ user.cpp:161:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tramvai.out", "w", stdout); ^ user.cpp:163:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:166:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf%lf", &a.x, &a.y, &b.x, &b.y); ^ user.cpp:170:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &ls1, &ls2, &lf1, &lf2); ^