View Compilation Error

0_0_17024076_26228.cpp:1:9: error: expected unqualified-id before 'if'
         if(n == 1 || n == 2){
         ^
0_0_17024076_26228.cpp:6:9: error: expected unqualified-id before 'for'
         for(int t=2*n-1; t>n+1; t-=2)
         ^
0_0_17024076_26228.cpp:6:26: error: 't' does not name a type
         for(int t=2*n-1; t>n+1; t-=2)
                          ^
0_0_17024076_26228.cpp:6:33: error: 't' does not name a type
         for(int t=2*n-1; t>n+1; t-=2)
                                 ^
0_0_17024076_26228.cpp:9:15: error: expected constructor, destructor, or type conversion before '(' token
         printf("%d\n", sum*func_pow(2, n/2)/func(n/2+n%2));
               ^