/in/foo.cc: In function 'int main(int, char**)':
/in/foo.cc:13:7: error: 'i' was not declared in this scope
  for( i=1;i<=n;i=i+1)
       ^
/in/foo.cc:18:7: error: 'i' was not declared in this scope
  for( i=1;i<=n;i=i+1)
       ^