# include <cstdlib>
# include <iostream>
# include <cstring>
using namespace std;
int main ( );
void fred ( string *name );
//****************************************************************************80
int main ( )
//****************************************************************************80
//
// Purpose:
//
// MAIN is the main program for CHARACTER_ARG.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 25 May 2013
//
// Author:
//
// John Burkardt
//
{
string name;
cout << "\n";
cout << "CHARACTER_ARG:\n";
cout << " Demonstrate how a C function can return character data\n";
cout << " through the argument list.\n";
cout << "\n";
cout << " Our main program declares a string:\n";
cout << " string name;\n";
cout << " then calls function fred() with the ADDRESS of the string:\n";
cout << " fred ( &name );\n";
cout << " Function fred receives its argument as\n";
cout << " void fred ( string *name )\n";
cout << " It sets a value to the string:\n";
cout << " *name = \"ob_data.txt\" );\n";
cout << " The main program now has a string stored in name.\n";
fred ( &name );
cout << "\n";
cout << " The value of name is now = \"" << name << "\".\n";
cout << "\n";
cout << "CHARACTER_ARG:\n";
cout << " Normal end of execution.\n";
return 0;
}
//****************************************************************************80
void fred ( string *name )
//****************************************************************************80
//
// Purpose:
//
// FRED returns character data through one of its arguments.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 25 May 2013
//
// Author:
//
// John Burkardt
//
// Parameter:
//
// Input, string *NAME, the address of the address of a character.
// The value *NAME is the address of a character, and can be set
// to the address of a string of interest to the user.
//
{
*name = "ob_data.txt";
return;
}
