View Compilation Error

0_0_26357872_2243.cpp: In function 'int main()':
0_0_26357872_2243.cpp:41:65: error: 'strcmp' was not declared in this scope
  while(scanf("%d%s",&target,str)!=EOF&&(target||strcmp(str,"END")!=0))
                                                                 ^
0_0_26357872_2243.cpp:43:15: error: 'strlen' was not declared in this scope
   l=strlen(str);
               ^