View Compilation Error

0_0_36693883_1267.cpp:32:51: error: no macro name given in #define directive
 #define //freopenr //freopen("in.txt", "r", stdin)
                                                   ^
0_0_36693883_1267.cpp:33:53: error: no macro name given in #define directive
 #define //freopenw //freopen("out.txt", "w", stdout)
                                                     ^
0_0_36693883_1267.cpp:77:1: error: expected unqualified-id before '.' token
 .
 ^