View Compilation Error

0_0_36261064_27592.cpp: In function 'void test()':
0_0_36261064_27592.cpp:10:22: error: 'memset' was not declared in this scope
  memset(s,0,sizeof(s));
                      ^
0_0_36261064_27592.cpp: In function 'int main()':
0_0_36261064_27592.cpp:45:22: error: 'memset' was not declared in this scope
  memset(s,0,sizeof(s));
                      ^