View Compilation Error

0_0_17129545_22488.cpp: In function 'int main()':
0_0_17129545_22488.cpp:10:6: error: 'cin' was not declared in this scope
      cin>>t ;
      ^
0_0_17129545_22488.cpp:12:34: error: 'scanf' was not declared in this scope
           scanf("%d%lf" , &n , &p) ;
                                  ^
0_0_17129545_22488.cpp:18:37: error: 'memset' was not declared in this scope
           memset(dp , 0 , sizeof(dp)) ;
                                     ^
0_0_17129545_22488.cpp:32:34: error: 'pow' was not declared in this scope
          double all = pow(2.0 , n)  , s ;
                                  ^
0_0_17129545_22488.cpp:36:15: error: 's' was not declared in this scope
               s = 0 ;
               ^
0_0_17129545_22488.cpp:47:29: error: 'printf' was not declared in this scope
          printf("%d\n" , ans) ;
                             ^