View Compilation Error

0_0_21249191_25254.cpp: In function 'void bfs(int, int)':
0_0_21249191_25254.cpp:25:26: error: 'memset' was not declared in this scope
  memset(ma, 0, sizeof(ma));
                          ^
0_0_21249191_25254.cpp: In function 'void Get()':
0_0_21249191_25254.cpp:53:36: error: 'memset' was not declared in this scope
  memset(sumTime, 0, sizeof(sumTime));
                                    ^
0_0_21249191_25254.cpp: In function 'int main()':
0_0_21249191_25254.cpp:83:23: error: 'memset' was not declared in this scope
   memset(T,0,sizeof(T));
                       ^