View Compilation Error

0_0_35091296_11544.cpp: In function 'void Pro()':
0_0_35091296_11544.cpp:28:31: error: 'memset' was not declared in this scope
       memset(chk,0,sizeof(chk));
                               ^
0_0_35091296_11544.cpp: In function 'int main()':
0_0_35091296_11544.cpp:39:33: error: 'memset' was not declared in this scope
         memset(map,0,sizeof(map));
                                 ^