View Compilation Error

0_0_38626900_16277.cpp: In function 'int main()':
0_0_38626900_16277.cpp:17:3: error: 'memset' was not declared in this scope
   memset(sum, '0', sizeof(sum));
   ^~~~~~
0_0_38626900_16277.cpp:17:3: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
0_0_38626900_16277.cpp:8:1:
+#include <cstring>
 #include<utility>
0_0_38626900_16277.cpp:17:3:
   memset(sum, '0', sizeof(sum));
   ^~~~~~