Eroare de compilare: main.cpp:8:11: error: 'int y1' redeclared as different kind of symbol int x1,x2,y1,y2; ^~ In file included from /usr/include/features.h:367:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/os_defines.h:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/c++config.h:507, from /usr/include/c++/6/cassert:43, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:33, from main.cpp:1: /usr/include/x86_64-linux-gnu/bits/mathcalls.h:251:1: note: previous declaration 'double y1(double)' __MATHCALL (y1,, (_Mdouble_)); ^ main.cpp: In function 'void rez()': main.cpp:14:25: warning: pointer to a function used in arithmetic [-Wpointer-arith] if(x2-x1<abs(y1-y2)){ ^~ main.cpp:14:27: error: no matching function for call to 'abs(double (*)(double) throw ())' if(x2-x1<abs(y1-y2)){ ^ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:47, from main.cpp:1: /usr/include/stdlib.h:774:12: note: candidate: int abs(int) <near match> extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^~~ /usr/include/stdlib.h:774:12: note: conversion of argument 1 would be ill-formed: main.cpp:14:24: error: invalid conversion from 'double (*)(double) throw ()' to 'int' [-fpermissive] if(x2-x1<abs(y1-y2)){ ~~^~~ In file included from /usr/include/c++/6/valarray:587:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95, from main.cpp:1: /usr/include/c++/6/bits/valarray_after.h:442:5: note: candidate: template<class _Tp> std::_Expr<std::_UnClos<std::_Abs, std::_ValArray, _Tp>, _Tp> std::abs(const std::valarray<_Tp>&) _DEFINE_EXPR_UNARY_FUNCTION(abs, _Abs) ^ /usr/include/c++/6/bits/valarray_after.h:442:5: note: template argument deduction/substitution failed: main.cpp:14:27: note: mismatched types 'const std::valarray<_Tp>' and 'double (*)(double) throw ()' if(x2-x1<abs(y1-y2)){ ^ In file included from /usr/include/c++/6/valarray:587:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95, from main.cpp:1: /usr/include/c++/6/bits/valarray_after.h:442:5: note: candidate: template<class _Dom> std::_Expr<std::_UnClos<std::_Abs, std::_Expr, _Dom>, typename _Dom::value_type> std::abs(const std::_Expr<_Dom1, typename _Dom1::value_type>&) _DEFINE_EXPR_UNARY_FUNCTION(abs, _Abs) ^ /usr/include/c++/6/bits/valarray_after.h:442:5: note: template argument deduction/substitution failed: main.cpp:14:27: note: mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'double (*)(double) throw ()' if(x2-x1<abs(y1-y2)){ ^ In file included from /usr/include/c++/6/ccomplex:39:0, Non zero exit status: 1