View Compilation Error

0_0_18208024_11353.cpp: In function 'int main()':
0_0_18208024_11353.cpp:19:25: error: 'strcmp' was not declared in this scope
 if(strcmp(a,"ENDOFINPUT")==0)break;
                         ^
0_0_18208024_11353.cpp:20:20: error: 'strcmp' was not declared in this scope
 if(strcmp(a,"START")==0)continue;
                    ^
0_0_18208024_11353.cpp:21:18: error: 'strcmp' was not declared in this scope
 if(strcmp(a,"END")==0)continue;
                  ^
0_0_18208024_11353.cpp:22:17: error: 'strlen' was not declared in this scope
 int len=strlen(a);
                 ^