Compilare: user.cpp: In function ‘int main()’: user.cpp:80:33: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] scanf("%d%d%llf",&n,&m,&Lmax); ^ user.cpp:126:73: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] printf("%.3llf %.3llf", m_ef[dest.x][dest.y], m_dist[dest.x][dest.y]); ^ user.cpp:126:73: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] user.cpp:77:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("excursie.in","r",stdin); ^ user.cpp:78:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("excursie.out","w",stdout); ^ user.cpp:80:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%llf",&n,&m,&Lmax); ^ user.cpp:83:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&matrix[i][j]); ^ user.cpp: In member function ‘void Position::read()’: user.cpp:30:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^