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: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:13:1: error: extended character   is not valid in an identifier
   13 |         d =sqrt(pow(xa - xb, 2.0) + pow(ya - yb, 2.0));
      | ^
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:13:1: error: extended character   is not valid in an identifier
a.cc:14:1: error: extended character   is not valid in an identifier
   14 |         if(d + rb < ra)         { cout << "2" << endl; }
      | ^
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:15:1: error: extended character   is not valid in an identifier
   15 |         else if(d + ra < rb)    { cout << "-2" << endl; }
      | ^
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:15:1: error: extended character   is not valid in an identifier
a.cc:16:1: error: extended character   is not valid in an identifier
   16 |         else if(d <= ra + rb)   { cout << "1" << 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:17:1: error: extended character   is not valid in an identifier
   17 |         else                    { cout << "0" << 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 |     }
      | ^
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:19:1: error: extended character   is not valid in an identifier
   19 |     return 0;
      | ^
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: 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; did you mean 'yn'?
   10 |     cin >> n;
      |            ^
      |            yn
a.cc:11:9: error: expected primary-expression before 'int'
   11 |     for(int i = 0; i < n; i++) {
      |         ^~~
a.cc:11:20: error: 'i' was not declared in this scope
   11 |     for(int i = 0; i < n; i++) {
      |                    ^
a.cc:19:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0return' was not declared in this scope
   19 |     return 0;
      | ^~~~~~~~~~