C++ Primer 7.3

7.3.cpp

#include <iostream>

struct box
{
  char maker[40];
  float height;
  float width;
  float length;
  float volume;
};

void displayBox(box _box);
void calcBoxVolume(box * _box);

int main()
{
  box xbox;
  memset(xbox.maker, 0, sizeof(xbox.maker));
  strncpy(xbox.maker, "Microsoft", sizeof(xbox.maker) -1);
  xbox.height = 10.0;
  xbox.width = 20.0;
  xbox.length = 30.0;
  calcBoxVolume(&xbox);
  displayBox(xbox);

  return 0;
}

void calcBoxVolume(box * _box)
{
  _box->volume = _box->height * _box->width * _box->length;
}

void displayBox(box _box)
{
  using namespace std;

  cout << "maker: " << _box.maker << endl;
  cout << "height: " << _box.height << endl;
  cout << "width: " << _box.width << endl;
  cout << "length: " << _box.length << endl;
  cout << "volume: " << _box.volume << endl;
}