Language: C++

#include    <iostream>
#include    <cmath>

using namespace std;

int main() {
    int n;
    double xa, ya, ra, xb, yb, rb, d;

    cin >> n;
    for(int i = 0; i < n; i++) {
        cin >> xa >> ya >> ra >> xb >> yb >> rb;

        d =sqrt(pow(xa - xb, 2.0) + pow(ya - yb, 2.0));

        if(d + rb < ra)          { cout << "2"  << endl; }
        else if(d + ra < rb) { cout << "-2" << endl; }
        else if(d <= ra + rb)    { cout << "1"  << endl; }
        else                    { cout << "0"  << endl; }
    }
    return 0;
}


Compiler output:
a.cc:1:2: error: extended character   is not valid in an identifier
    1 | #include    <iostream>
      |  ^
a.cc:1:2: error: extended character   is not valid in an identifier
a.cc:1:2: error: extended character   is not valid in an identifier
a.cc:1:2: error: invalid preprocessing directive #include\U000000a0\U000000a0\U000000a0
    1 | #include    <iostream>
      |  ^~~~~~~~~~
a.cc:2:2: error: extended character   is not valid in an identifier
    2 | #include    <cmath>
      |  ^
a.cc:2:2: error: extended character   is not valid in an identifier
a.cc:2:2: error: extended character   is not valid in an identifier
a.cc:2:2: error: invalid preprocessing directive #include\U000000a0\U000000a0\U000000a0
    2 | #include    <cmath>
      |  ^~~~~~~~~~
a.cc:7:1: error: extended character   is not valid in an identifier
    7 |     int n;
      | ^
a.cc:7:1: error: extended character   is not valid in an identifier
a.cc:7:1: error: extended character   is not valid in an identifier
a.cc:7:1: error: extended character   is not valid in an identifier
a.cc:8:1: error: extended character   is not valid in an identifier
    8 |     double xa, ya, ra, xb, yb, rb, d;
      | ^
a.cc:8:1: error: extended character   is not valid in an identifier
a.cc:8:1: error: extended character   is not valid in an identifier
a.cc:8:1: error: extended character   is not valid in an identifier
a.cc:10:1: error: extended character   is not valid in an identifier
   10 |     cin >> n;
      | ^
a.cc:10:1: error: extended character   is not valid in an identifier
a.cc:10:1: error: extended character   is not valid in an identifier
a.cc:10:1: error: extended character   is not valid in an identifier
a.cc:11:1: error: extended character   is not valid in an identifier
   11 |     for(int i = 0; i < n; i++) {
      | ^
a.cc:11:1: error: extended character   is not valid in an identifier
a.cc:11:1: error: extended character   is not valid in an identifier
a.cc:11:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
   12 |         cin >> xa >> ya >> ra >> xb >> yb >> rb;
      | ^
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:12:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
   14 |         d =sqrt(pow(xa - xb, 2.0) + pow(ya - yb, 2.0));
      | ^
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
   16 |         if(d + rb < ra)          { cout << "2"  << endl; }
      | ^
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
   16 |         if(d + rb < ra)          { cout << "2"  << endl; }
      |                        ^
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:24: error: extended character   is not valid in an identifier
a.cc:16:44: error: extended character   is not valid in an identifier
   16 |         if(d + rb < ra)          { cout << "2"  << endl; }
      |                                            ^
a.cc:17:1: error: extended character   is not valid in an identifier
   17 |         else if(d + ra < rb) { cout << "-2" << endl; }
      | ^
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:17:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
   18 |         else if(d <= ra + rb)    { cout << "1"  << endl; }
      | ^
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:1: error: extended character   is not valid in an identifier
a.cc:18:30: error: extended character   is not valid in an identifier
   18 |         else if(d <= ra + rb)    { cout << "1"  << endl; }
      |                              ^
a.cc:18:30: error: extended character   is not valid in an identifier
a.cc:18:30: error: extended character   is not valid in an identifier
a.cc:18:44: error: extended character   is not valid in an identifier
   18 |         else if(d <= ra + rb)    { cout << "1"  << endl; }
      |                                            ^
a.cc:19:1: error: extended character   is not valid in an identifier
   19 |         else                    { cout << "0"  << endl; }
      | ^
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:1: error: extended character   is not valid in an identifier
a.cc:19:43: error: extended character   is not valid in an identifier
   19 |         else                    { cout << "0"  << endl; }
      |                                           ^
a.cc:20:1: error: extended character   is not valid in an identifier
   20 |     }
      | ^
a.cc:20:1: error: extended character   is not valid in an identifier
a.cc:20:1: error: extended character   is not valid in an identifier
a.cc:20:1: error: extended character   is not valid in an identifier
a.cc:21:1: error: extended character   is not valid in an identifier
   21 |     return 0;
      | ^
a.cc:21:1: error: extended character   is not valid in an identifier
a.cc:21:1: error: extended character   is not valid in an identifier
a.cc:21:1: error: extended character   is not valid in an identifier
a.cc: In function 'int main()':
a.cc:7:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0int' was not declared in this scope
    7 |     int n;
      | ^~~~~~~
a.cc:8:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0double' was not declared in this scope
    8 |     double xa, ya, ra, xb, yb, rb, d;
      | ^~~~~~~~~~
a.cc:10:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0cin' was not declared in this scope
   10 |     cin >> n;
      | ^~~~~~~
a.cc:10:12: error: 'n' was not declared in this scope
   10 |     cin >> n;
      |            ^
a.cc:11:9: error: expected primary-ex