View Compilation Error

0_0_25950724_18923.cpp: In function 'int findroot()':
0_0_25950724_18923.cpp:25:20: error: 'n' was not declared in this scope
     for(int i=1;i<=n;i++)
                    ^
0_0_25950724_18923.cpp:26:17: error: 'in' was not declared in this scope
             if(!in[i])
                 ^