View Compilation Error

0_0_39761954_11333.c:2:1: error: unknown type name 'using'
    2 | using namespace std;
      | ^~~~~
0_0_39761954_11333.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    2 | using namespace std;
      |                 ^~~
0_0_39761954_11333.c: In function 'main':
0_0_39761954_11333.c:11:9: error: 'cin' undeclared (first use in this function)
   11 |         cin>>n;
      |         ^~~
0_0_39761954_11333.c:11:9: note: each undeclared identifier is reported only once for each function it appears in
0_0_39761954_11333.c:21:59: error: 'cout' undeclared (first use in this function)
   21 |                                 for(int i=ting;i<xie;i++){cout<<s[i];}
      |                                                           ^~~~
0_0_39761954_11333.c:29:39: error: 'endl' undeclared (first use in this function)
   29 |                                 cout<<endl;
      |                                       ^~~~