View Compilation Error

0_0_34736065_19251.cpp: In function 'int Insert(char*, int)':
0_0_34736065_19251.cpp:63:32: error: 'strcpy' was not declared in this scope
         strcpy(ball[0].col, str);
                                ^
0_0_34736065_19251.cpp:71:41: error: 'strcmp' was not declared in this scope
         flag = strcmp(str, ball[mid].col); //比较字符串大小 
                                         ^
0_0_34736065_19251.cpp:87:34: error: 'strcpy' was not declared in this scope
         strcpy(ball[low].col, str);
                                  ^