View Compilation Error

0_0_39082856_1961.cpp: In function 'int main()':
0_0_39082856_1961.cpp:9:17: error: 'strlen' was not declared in this scope
    9 |         len_a = strlen(a);
      |                 ^~~~~~
0_0_39082856_1961.cpp:2:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include<iostream>
  +++ |+#include <cstring>
    2 | using namespace std;
0_0_39082856_1961.cpp:12:9: error: 'memset' was not declared in this scope
   12 |         memset(a1, 0, 2000);
      |         ^~~~~~
0_0_39082856_1961.cpp:12:9: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?