View Compilation Error

0_0_37204620_29519.cpp: In function 'int main()':
0_0_37204620_29519.cpp:38:8: error: 'fin' was not declared in this scope
  int t;fin>>t;
        ^
0_0_37204620_29519.cpp:63:3: error: 'fout' was not declared in this scope
   fout<<A<<' '<<B<<'\n';
   ^