title: istream and ostream problem - C++
body: <p>I am using two compilers g++ and Dev - C++. when I compile my program on Dev-C++ it compiles perfectly. but when i try to compile it on g++ it gives me two errors:</p>
  
  <pre>
  In file included from a2test.cpp:27:
  ----.h:25: error: 'ostream' has not been declared
  ----.h:26: error: 'istream' has not been declared
  </pre>
  
  <p>Can anyone tell me what can I do to solve this problem.</p>
  
  <p>Thanks</p>