View Compilation Error

0_0_38647615_27091.cpp: In function 'int main()':
0_0_38647615_27091.cpp:37:3: error: 'memset' was not declared in this scope
   memset(f,0,sizeof(f));
   ^~~~~~
0_0_38647615_27091.cpp:37:3: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
0_0_38647615_27091.cpp:2:1:
+#include <cstring>
 using namespace std;
0_0_38647615_27091.cpp:37:3:
   memset(f,0,sizeof(f));
   ^~~~~~