foo.cpp: In function 'void shop(char*)':
foo.cpp:10:27: error: 'strcmp' was not declared in this scope
      if (!strcmp(s,name[i])){
                           ^
foo.cpp:18:32: error: 'strcmp' was not declared in this scope
          if (!strcmp(dn,name[i])){
                                ^
foo.cpp: In function 'int main()':
foo.cpp:27:30: error: 'memset' was not declared in this scope
     memset(incm,0,sizeof(int));
                              ^