Compilare: user.cpp: In constructor ‘Line::Line(int, int)’: user.cpp:12:13: warning: ‘Line::m’ will be initialized after [-Wreorder] int m; ^ user.cpp:11:13: warning: ‘int Line::n’ [-Wreorder] int n; ^ user.cpp:15:9: warning: when initialized here [-Wreorder] Line(const int _m, const int _n): m(_m), n(_n), cross(kInf) {} ^ user.cpp: In function ‘int main()’: user.cpp:115:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cascaval.in", "r", stdin); ^ user.cpp:116:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cascaval.out", "w", stdout); ^ user.cpp:118:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:120:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &f[i], &c[i], &s[i], &d[i]); ^