View Compilation Error

0_0_13797302_24123.cpp: In function 'int main()':
0_0_13797302_24123.cpp:77:35: error: 'memset' was not declared in this scope
         memset(map, 0, sizeof(map)); 
                                   ^
0_0_13797302_24123.cpp:93:17: error: 'www' was not declared in this scope
             {   www.2cto.com
                 ^
0_0_13797302_24123.cpp:97:44: error: 'strcmp' was not declared in this scope
                 strcmp(cat[cat_num].str2, b); 
                                            ^
0_0_13797302_24123.cpp:107:44: error: 'strcmp' was not declared in this scope
                 strcmp(dog[dog_num].str1, a); 
                                            ^
0_0_13797302_24123.cpp:121:52: error: 'strcmp' was not declared in this scope
                 if(!strcmp(cat[i].str1, dog[j].str2) || !strcmp(cat[i].str2, dog[j].str1)) 
                                                    ^