View Compilation Error

0_0_15936702_18109.cpp: In function 'int main()':
0_0_15936702_18109.cpp:11:5: error: expected primary-expression before '.' token
     ..freopen("input.txt", "r", stdin);
     ^
0_0_15936702_18109.cpp:11:6: error: expected unqualified-id before '.' token
     ..freopen("input.txt", "r", stdin);
      ^