/in/foo.cc: In function 'int main()':
/in/foo.cc:8:2: error: expected ';' before 'while'
  while(nt!=0)
  ^~~~~
/in/foo.cc:13:5: error: 'x' was not declared in this scope
  if(x==n)
     ^
/in/foo.cc:5:8: warning: unused variable 'y' [-Wunused-variable]
  int n,y=0,nt;
        ^