class String
{
public:
String(const char *str = NULL);
String(const String &other);
~String();
String & operator= (const String &other);
private:
char *m_data;
};
String::String(const char *str)
{
if (str == NULL)
{
m_data = new char[1];
*m_data = '\0';
if (m_data == NULL)
{
cout << "Memory error";
}
}
else
{
int length = strlen(str);
m_data = new char[length + 1];
if (m_data == NULL)
{
cout << "Memory error";
}
strcpy(m_data, str);
}
}
String::~String()
{
delete [] m_data;
}
String::String(const String &other)
{
int length = strlen(other.m_data);
m_data = new char[length + 1];
if (m_data == NULL)
{
cout << "Memory error";
}
strcpy(m_data, other.m_data);
}
String & String::operator= (const String &other)
{
if (this == &other)
{
return *this;
}
delete [] m_data;
int length = strlen(other.m_data);
m_data = new char[length + 1];
strcpy(m_data, other.m_data);
return *this;
}