/in/foo.cc: In function 'int main()':
/in/foo.cc:22:8: error: expected primary-expression before ')' token
  while(){
        ^
/in/foo.cc:26:6: error: 'i' was not declared in this scope
   if(i<0){
      ^
/in/foo.cc:17:8: warning: unused variable 'tmp' [-Wunused-variable]
  int m,tmp=5;
        ^~~