Compilare: user.cpp: In member function ‘bool Interval::operator=(const Interval&)’: user.cpp:32:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void read()’: user.cpp:57:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(iname, "r", stdin); ^ user.cpp:58:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &k); ^ user.cpp:60:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &v[i].capat, &v[i].cost); ^ user.cpp: In function ‘int main()’: user.cpp:76:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(oname, "w", stdout); ^