View Compilation Error

0_0_31727860_21420.cpp: In function 'int main()':
0_0_31727860_21420.cpp:12:2: error: expected ';' before 'long'
  long r;
  ^
0_0_31727860_21420.cpp:13:2: error: 'r' was not declared in this scope
  r=Fac(x);
  ^