View Compilation Error

0_0_23421000_11186.cpp: In function 'int main()':
0_0_23421000_11186.cpp:17:31: error: 'memcpy' was not declared in this scope
       memcpy(p, np, sizeof(np)); memset(np, 0, sizeof(np));
                               ^
0_0_23421000_11186.cpp:17:58: error: 'memset' was not declared in this scope
       memcpy(p, np, sizeof(np)); memset(np, 0, sizeof(np));
                                                          ^