Eroare de compilare: user.cpp: In function ‘double d(point, point, point)’: user.cpp:22:68: warning: left operand of comma operator has no effect [-Wunused-value] if(p.x < min(a.x, b.x) || p.x > max(a.x, b.x) || p.y < (a.y, b.y) || p.y > (a.y, b.y)) { ^ user.cpp:22:88: warning: left operand of comma operator has no effect [-Wunused-value] if(p.x < min(a.x, b.x) || p.x > max(a.x, b.x) || p.y < (a.y, b.y) || p.y > (a.y, b.y)) { ^ user.cpp:25:34: error: cannot convert ‘std::pair<int, point>’ to ‘double’ in return return make_pair(m, a); ^ user.cpp:27:30: error: cannot convert ‘std::pair<int, point>’ to ‘double’ in return return make_pair(n, b); ^ user.cpp:29:52: error: no matching function for call to ‘make_pair(double)’ return make_pair(area(p, a, b) * 2 / dist(a, b)); ^ user.cpp:29:52: note: candidate is: In file included from /usr/include/c++/4.8/bits/stl_algobase.h:64:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:2: /usr/include/c++/4.8/bits/stl_pair.h:276:5: note: template<class _T1, class _T2> constexpr std::pair<typename std::__decay_and_strip<_Tp>::__type, typename std::__decay_and_strip<_T2>::__type> std::make_pair(_T1&&, _T2&&) make_pair(_T1&& __x, _T2&& __y) ^ /usr/include/c++/4.8/bits/stl_pair.h:276:5: note: template argument deduction/substitution failed: user.cpp:29:52: note: candidate expects 2 arguments, 1 provided return make_pair(area(p, a, b) * 2 / dist(a, b)); ^ user.cpp: In function ‘int main()’: user.cpp:49:48: error: conversion from ‘double’ to non-scalar type ‘std::pair<double, point>’ requested pair<double, point> dp = d(P, p, p1); ^ user.cpp: In function ‘double d(point, point, point)’: user.cpp:30:1: warning: control reaches end of non-void function [-Wreturn-type] } ^