View Compilation Error

0_0_20047801_24277.cpp:3:1: error: expected unqualified-id before 'for'
 for(int i=3;i<30;i++)
 ^
0_0_20047801_24277.cpp:3:13: error: 'i' does not name a type
 for(int i=3;i<30;i++)
             ^
0_0_20047801_24277.cpp:3:18: error: 'i' does not name a type
 for(int i=3;i<30;i++)
                  ^