View Compilation Error

0_0_4551215_23582.cpp: In function `int main()':
0_0_4551215_23582.cpp:90: error: invalid initialization of non-const reference of type 'state&' from a temporary of type 'state'
0_0_4551215_23582.cpp:22: error: in passing argument 1 of `bool Equal(state&, state&)'
0_0_4551215_23582.cpp:105: error: invalid initialization of non-const reference of type 'state&' from a temporary of type 'state'
0_0_4551215_23582.cpp:22: error: in passing argument 1 of `bool Equal(state&, state&)'