View Compilation Error

0_0_39321653_27622.c:1:1: error: unknown type name 'using'
    1 | using namespace std;
      | ^~~~~
0_0_39321653_27622.c:1:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    1 | using namespace std;
      |                 ^~~
0_0_39321653_27622.c:2:10: fatal error: iostream: No such file or directory
    2 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.