View Compilation Error

0_0_24381614_28037.cpp: In function 'int main()':
0_0_24381614_28037.cpp:53:9: error: expected unqualified-id before 'case'
     int case=1;
         ^
0_0_24381614_28037.cpp:67:64: error: 'cas' was not declared in this scope
         printf("Case %d: The total value of the hook is %d.\n",cas++,tree[1].sum);
                                                                ^