Compilare: user.cpp: In constructor ‘Line::Line(double, double)’: user.cpp:18:15: warning: ‘Line::m’ will be initialized after [-Wreorder] double n, m; ^ user.cpp:18:12: warning: ‘double Line::n’ [-Wreorder] double n, m; ^ user.cpp:20:5: warning: when initialized here [-Wreorder] Line(const double _m, const double _n) : m(_m), n(_n), x(kInf) {} ^ user.cpp: In function ‘int main()’: user.cpp:73:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euro.in", "r", stdin); ^ user.cpp:74:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euro.out", "w", stdout); ^ user.cpp:82:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &t); ^ user.cpp:85:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v); ^