View Compilation Error

0_0_25993648_24696.cpp: In function 'int getsum(int)':
0_0_25993648_24696.cpp:27:32: error: 'memset' was not declared in this scope
     memset(link,-1,sizeof(link));
                                ^
0_0_25993648_24696.cpp: In function 'int main()':
0_0_25993648_24696.cpp:40:29: error: 'memset' was not declared in this scope
         memset(g,0,sizeof(g));
                             ^