View Compilation Error

0_0_30397690_19866.cpp: In function 'int main()':
0_0_30397690_19866.cpp:52:41: error: 'strcpy' was not declared in this scope
                 strcpy(cat[cnt_cat].a, a);
                                         ^
0_0_30397690_19866.cpp:58:41: error: 'strcpy' was not declared in this scope
                 strcpy(dog[cnt_dog].a, a);
                                         ^
0_0_30397690_19866.cpp:64:41: error: 'memset' was not declared in this scope
         memset(maze, false, sizeof(maze));
                                         ^
0_0_30397690_19866.cpp:67:46: error: 'strcmp' was not declared in this scope
                 if (strcmp(cat[i].a, dog[j].b) == 0 || strcmp(cat[i].b, dog[j].a) == 0)             
                                              ^