View Compilation Error

0_0_13238163_16614.cpp: In function 'void prim()':
0_0_13238163_16614.cpp:11:28: error: 'memset' was not declared in this scope
  memset(vis, 0, sizeof(vis));
                            ^
0_0_13238163_16614.cpp: In function 'int main()':
0_0_13238163_16614.cpp:44:31: error: 'memset' was not declared in this scope
   memset(map, INF, sizeof(map));
                               ^