View Compilation Error

0_0_37674067_31169.cpp: In function 'int main()':
0_0_37674067_31169.cpp:33:16: error: 'sum' was not declared in this scope
         memset(sum,0,sizeof(sum));
                ^
0_0_37674067_31169.cpp:34:15: error: 'tree' was not declared in this scope
        memset(tree,0,sizeof(tree));
               ^