View Compilation Error

0_0_30850478_30870.cpp:70:34: error: two or more data types in declaration of 'dfs'
 void int dfs(int pos,int u,int fa){
                                  ^
0_0_30850478_30870.cpp: In function 'int main()':
0_0_30850478_30870.cpp:100:18: error: 'dfs' was not declared in this scope
         dfs(i,i,i);
                  ^