View Compilation Error

0_0_20060042_15964.cpp: In function 'int main()':
0_0_20060042_15964.cpp:64:17: error: '$index' was not declared in this scope
     int index = $index;
                 ^
0_0_20060042_15964.cpp:65:14: error: '$th' was not declared in this scope
     int th = $th;
              ^