/////////////////////////////////////////////////////
//  struct.cpp - how do I define and use a struct? //
/////////////////////////////////////////////////////
#include <iostream>
using namespace std;

void main() {

  struct test {               // struct declaration
    int x;                    // defines a pattern of memory use
    double d[3];      
    char *pChar;
  };

  test one;                   // struct definition allocates memory

  one.x = 3;                  // this is how struct memory is initialized
  one.d[0] = 0.5;
  one.d[1] = 1.5;
  one.d[2] = 2.5;
  one.pChar = new char[3];
  one.pChar[0] = 'a';
  one.pChar[1] = 'b';
  one.pChar[2] = 'c';

  cout << "\n  one = {"       // this is how struct memory is used
       << "\n    " << one.x
       << "\n    " 
       << one.d[0] << ", "
       << one.d[1] << ", "
       << one.d[2]
       << "\n    " 
       << one.pChar[0] << ", "
       << one.pChar[1] << ", "
       << one.pChar[2]
       << "\n  }\n\n";
}