View Compilation Error

0_0_16378452_26107.cpp: In function 'bool cmp(node, node)':
0_0_16378452_26107.cpp:20:47: error: 'strcmp' was not declared in this scope
     if(a.age == b.age && strcmp(a.name, b.name) < 0) return true;   
                                               ^
0_0_16378452_26107.cpp: In function 'int main()':
0_0_16378452_26107.cpp:30:36: error: 'strcpy' was not declared in this scope
         strcpy(family[0].name,"Ted");
                                    ^
0_0_16378452_26107.cpp:43:56: error: 'strcmp' was not declared in this scope
                 if(strcmp(family[t].name,input[i].fname)==0) 
                                                        ^