/in/foo.cc: In function 'int main()':
/in/foo.cc:21:6: error: 'i' was not declared in this scope
  for(i = 0; i < n; i++)
      ^
/in/foo.cc:32:3: error: 'i' was not declared in this scope
   i = j;
   ^
/in/foo.cc:49:6: error: 'j' was not declared in this scope
  for(j = 0; j < n; j++)
      ^
/in/foo.cc:58:2: error: 'j' was not declared in this scope
  j = 0;
  ^
/in/foo.cc:62:6: error: 'i' was not declared in this scope
  for(i = j; i < n; i++)
      ^