View Compilation Error

0_0_22160111_37.cpp: In function 'int main()':
0_0_22160111_37.cpp:3:7: error: 'cin' was not declared in this scope
 int x;cin.tie(0);
       ^
0_0_22160111_37.cpp:4:1: error: 'ios' has not been declared
 ios::sync_with_stdio(0);
 ^