View Compilation Error

0_0_8901367_18896.cpp: In function `int main()':
0_0_8901367_18896.cpp:83: error: cannot convert `node' to `node*' in assignment
0_0_8901367_18896.cpp:86: error: `key' undeclared (first use this function)
0_0_8901367_18896.cpp:86: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8901367_18896.cpp:91: error: cannot convert `char*' to `node*' for argument `1' to `int find(node*)'