View Compilation Error

0_0_22718097_3788.cpp: In function 'int main()':
0_0_22718097_3788.cpp:104:2: error: expected primary-expression before '/' token
  /./freopen("data","r",stdin);
  ^
0_0_22718097_3788.cpp:104:3: error: expected primary-expression before '.' token
  /./freopen("data","r",stdin);
   ^
0_0_22718097_3788.cpp:104:4: error: expected unqualified-id before '/' token
  /./freopen("data","r",stdin);
    ^