/in/foo.cc: In function 'int main()':
/in/foo.cc:8:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
  while(x!=0);
  ^~~~~
/in/foo.cc:9:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
  {
  ^
/in/foo.cc:6:8: warning: unused variable 'y' [-Wunused-variable]
  int x,y,sum=0;
        ^