View Compilation Error

0_0_22071510_3573.cpp:1:1: error: expected unqualified-id before 'for'
 for (map<int,int>::iterator i=vis.begin();i!=vis.end();)
 ^
0_0_22071510_3573.cpp:1:43: error: 'i' does not name a type
 for (map<int,int>::iterator i=vis.begin();i!=vis.end();)
                                           ^
0_0_22071510_3573.cpp:1:56: error: expected unqualified-id before ')' token
 for (map<int,int>::iterator i=vis.begin();i!=vis.end();)
                                                        ^