View Compilation Error

0_0_39531405_32060.cpp: In function 'void euler(int)':
0_0_39531405_32060.cpp:12:9: error: 'memset' was not declared in this scope
   12 |         memset(isprime, true, sizeof(isprime));
      |         ^~~~~~
0_0_39531405_32060.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;