View Compilation Error

0_0_39100823_5209.cpp: In function 'int main()':
0_0_39100823_5209.cpp:13:17: error: 'memset' was not declared in this scope
   13 |                 memset(a1, 0, sizeof(a1));
      |                 ^~~~~~
0_0_39100823_5209.cpp:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include<iostream>
  +++ |+#include <cstring>
    2 | using namespace std;
0_0_39100823_5209.cpp:15:33: error: 'strlen' was not declared in this scope
   15 |                 int alen = (int)strlen(a);
      |                                 ^~~~~~
0_0_39100823_5209.cpp:15:33: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?