View Compilation Error

0_0_18506223_12292.cpp: In function 'void init(int)':
0_0_18506223_12292.cpp:29:32: error: 'memset' was not declared in this scope
  memset(dis1, inf, sizeof(dis1));
                                ^
0_0_18506223_12292.cpp: In function 'void spfa(int, int, int*)':
0_0_18506223_12292.cpp:47:28: error: 'memset' was not declared in this scope
  memset(inq, 0, sizeof(inq));
                            ^