View Compilation Error

0_0_23246118_4491.cpp: In function 'int main()':
0_0_23246118_4491.cpp:17:46: error: 'strcmp' was not declared in this scope
                 if(strcmp(ji[d].dao,ji[i].dao)>0) d=i;
                                              ^
0_0_23246118_4491.cpp:18:44: error: 'strcmp' was not declared in this scope
                 if(strcmp(ji[l].li,ji[i].li)<0) l=i;
                                            ^