Eroare de compilare: user.cpp:4:10: error: ‘int y1’ redeclared as different kind of symbol int t,x1,y1,r1,x2,y2,r2; ^ In file included from /usr/include/features.h:357:0, from /usr/include/assert.h:37, from /usr/include/c++/4.8/cassert:43, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:33, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:15:12: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ fin>>x1>>y1>>r1>>x2>>y2>>r2; ^ In file included from /usr/include/c++/4.8/sstream:38:0, from /usr/include/c++/4.8/complex:45, from /usr/include/c++/4.8/ccomplex:38, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/4.8/istream:872:5: error: initializing argument 1 of ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = double(double)throw ()]’ operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x) ^ user.cpp:16:26: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(x1==x2 && y1==y2 && r1==r2) ^ user.cpp:21:34: warning: pointer to a function used in arithmetic [-Wpointer-arith] dist=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2); ^ user.cpp:21:42: warning: pointer to a function used in arithmetic [-Wpointer-arith] dist=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2); ^ user.cpp:21:44: error: invalid operands of types ‘double (*)(double)throw ()’ and ‘double (*)(double)throw ()’ to binary ‘operator*’ dist=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2); ^