/in/foo.cc: In function 'int main()':
/in/foo.cc:28:7: warning: unused variable 'ctemp' [-Wunused-variable]
  char ctemp;
       ^~~~~
/in/foo.cc:29:25: warning: unused variable 'count' [-Wunused-variable]
  int zero,x,y,newx,newy,count=-1,k=1;
                         ^~~~~
/in/foo.cc:29:34: warning: unused variable 'k' [-Wunused-variable]
  int zero,x,y,newx,newy,count=-1,k=1;
                                  ^
/in/foo.cc: In function 'int findzero(std::__cxx11::string)':
/in/foo.cc:23:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^