View Compilation Error

0_0_26815428_19239.cpp: In function 'void getroot(int, int)':
0_0_26815428_19239.cpp:60:9: error: 'root' was not declared in this scope
         root=u;
         ^
0_0_26815428_19239.cpp: In function 'void divide(int)':
0_0_26815428_19239.cpp:89:5: error: 'ans' was not declared in this scope
     ans+=getans(u,a[u]);
     ^
0_0_26815428_19239.cpp:96:16: error: 'root' was not declared in this scope
         divide(root);
                ^
0_0_26815428_19239.cpp: In function 'int main()':
0_0_26815428_19239.cpp:137:16: error: 'root' was not declared in this scope
         divide(root);
                ^
0_0_26815428_19239.cpp:138:23: error: 'ans' was not declared in this scope
         printf("%d\n",ans);
                       ^