Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result In file included from /usr/include/c++/4.4/algorithm:62, from user.cpp:2: /usr/include/c++/4.4/bits/stl_algo.h: In function ‘_FIter std::lower_bound(_FIter, _FIter, const _Tp&, _Compare) [with _FIter = __gnu_cxx::__normal_iterator<interval*, std::vector<interval, std::allocator<interval> > >, _Tp = int, _Compare = bool (*)(interval, interval)]’: user.cpp:34: instantiated from here /usr/include/c++/4.4/bits/stl_algo.h:2495: error: conversion from ‘const int’ to non-scalar type ‘interval’ requested