View Compilation Error

0_0_6893379_3924.cpp: In function `int main()':
0_0_6893379_3924.cpp:109: error: invalid initialization of non-const reference of type 'state&' from a temporary of type 'state'
0_0_6893379_3924.cpp:32: error: in passing argument 1 of `int equ(state&, state&)'
0_0_6893379_3924.cpp:129: error: invalid initialization of non-const reference of type 'state&' from a temporary of type 'state'
0_0_6893379_3924.cpp:32: error: in passing argument 1 of `int equ(state&, state&)'