Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int x1,x2.y1.y2;
  cin >> x1 >>y1 >>x2 >>y2;
  if(x1>x2 && y1>y2){
    cout << x2+(y1-y2) << y2-(x1-x2) << x1+(y1-y2) << y1-(x1-x2);
  }else if(x1>x2 && y1<y2){
    cout << x2-(y2-y1) << y2-(x1-x2) << x1-(y2-y1) << y1-(x1-x2);
  }else if(x1<x2 && y1>y2){
    cout << x2+(y1-y2) << y2+(x2-x1) << x1+(y1-y2) << y1+(x2-x1)
  }else{
    cout << x1-(y2-y1) << y1-(x2-x1) << x2+(y2-y1) << y2-(x2-x1)
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:12: error: expected initializer before '.' token
    4 |   int x1,x2.y1.y2;
      |            ^
a.cc:5:13: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |   ~~~~~~~~~ ^~~~
      |       |       |
      |       |       double(double) noexcept
      |       std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(short int)y1' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(short unsigned int)y1' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(int)y1' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(unsigned int)y1' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(long int)y1' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(long unsigned int)y1' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(long long int)y1' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(long long unsigned int)y1' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
a.cc:5:15: error: cannot bind rvalue '(void*)y1' to 'void*&'
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>; __ios_type = std::basic_ios<char>]' (near match)
  126 |       operator>>(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:126:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: invalid conversion from 'double (*)(double) noexcept' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
    5 |   cin >> x1 >>y1 >>x2 >>y2;
      |               ^~
      |               |
      |               double (*)(double) noexcept
/usr/include/c++/14/istream:133:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  133 |       operator>>(ios_base& (*__pf)(ios_base&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:133:7: note:   conversion of argument 1 would be ill-formed:
a.cc:5:15: error: in