/in/foo.cc: In function 'long long int num(int, int)':
/in/foo.cc:8:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=x;i<=y;i++)
  ^~~
/in/foo.cc:10:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    return sum;
    ^~~~~~