View Compilation Error

0_0_22116339_19598.cpp: In function 'int main(int, char**)':
0_0_22116339_19598.cpp:38:26: error: 'strcmp' was not declared in this scope
         if(strcmp(a,"End")==0)
                          ^
0_0_22116339_19598.cpp:40:26: error: 'strcmp' was not declared in this scope
         if(strcmp(a,"Add")==0)
                          ^
0_0_22116339_19598.cpp:49:26: error: 'strcmp' was not declared in this scope
         if(strcmp(a,"Sub")==0)
                          ^
0_0_22116339_19598.cpp:58:28: error: 'strcmp' was not declared in this scope
         if(strcmp(a,"Query")==0)
                            ^