View Compilation Error

0_0_17185220_9818.cpp: In function 'void make()':
0_0_17185220_9818.cpp:13:22: error: 'memset' was not declared in this scope
  memset(l,0,sizeof(l));
                      ^
0_0_17185220_9818.cpp: In function 'int main()':
0_0_17185220_9818.cpp:48:23: error: 'memset' was not declared in this scope
   memset(a,0,sizeof(a));
                       ^