View Compilation Error

0_0_22335669_880.cpp: In function 'void init()':
0_0_22335669_880.cpp:20:46: error: 'memset' was not declared in this scope
  memset(colorlist, 0, sizeof(dic) * listlenth);
                                              ^
0_0_22335669_880.cpp: In function 'int main()':
0_0_22335669_880.cpp:46:45: error: 'strcmp' was not declared in this scope
     if (!strcmp(colorlist[j].key, inputcolor))
                                             ^
0_0_22335669_880.cpp:56:44: error: 'strcpy' was not declared in this scope
     strcpy(colorlist[index].key, inputcolor);
                                            ^
0_0_22335669_880.cpp:62:42: error: 'strcpy' was not declared in this scope
     strcpy(anscolor, colorlist[index].key);
                                          ^