View Compilation Error

0_0_29341545_13063.cpp: In function 'void BF()':
0_0_29341545_13063.cpp:28:29: error: 'memset' was not declared in this scope
     memset(inq,0,sizeof(inq));
                             ^
0_0_29341545_13063.cpp: In function 'int main()':
0_0_29341545_13063.cpp:73:41: error: 'memset' was not declared in this scope
         memset(isStone,0,sizeof(isStone));
                                         ^