Using a reference parameter for class type

 
#include <iostream>
#include <cstring>
#include <cstdlib>
using namespace std;

class StringClass {
  char *p;
public:
  StringClass(char *s);
  ~StringClass() { 
     delete [] p; 
  }
  char *get() { 
     return p; 
  }
};

StringClass::StringClass(char *s)
{
  int l;

  l = strlen(s)+1;

  p = new char [l];
  if(!p) {
    cout << "Allocation error\n";
    exit(1);
  }

  strcpy(p, s);
}

// Using a reference parameter.
void show(StringClass &x)
{
  char *s;
   
  s = x.get();
  cout << s << endl;
}

int main()
{
  StringClass stringObject1("Hello"), stringObject2("There");

  show(stringObject1);
  show(stringObject2);

  return 0;
}

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5.	Declares a pointer and then outputs its value without first assigning
6.	Null Pointers
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8.	Indirection Operator and Dereferencing
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Using a reference parameter for class type : Pointer Primitive « Pointer « C++

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