/in/foo.cc: In function 'int main()':
/in/foo.cc:5:5: error: expected initializer before 'cin'
    5 |     cin >> x;
      |     ^~~
/in/foo.cc:6:12: error: 'y' was not declared in this scope
    6 |     cin >> y;
      |            ^
/in/foo.cc:4:9: warning: unused variable 'x' [-Wunused-variable]
    4 |     int x,y
      |         ^