View Compilation Error

0_0_37889641_31258.cpp: In function 'int main()':
0_0_37889641_31258.cpp:109:12: error: 'efs' was not declared in this scope
   efs(ex,ey);
            ^
0_0_37889641_31258.cpp:115:23: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator*'
   printf("%d\n",min * 11);
                       ^