classs String
{
private:
char *m_data; //数据成员
public:
String(const char *str = NULL) //普通构造函数
{
if (str == NULL)
{
m_data = new char[1];
*m_data = '\0';
}
else
{
int len = strlen(str);
m_data = new char[len+1];
strcpy(m_data, str);
}
}
~String() //析构函数
{
delete []m_data;
m_data = NULL;
}
String(const String &other) //拷贝构造函数
{
int len = strlen(other.m_data);
m_data = new char[len + 1];
strcpy(m_data, other.m_data);
}
String& operate=(const String &other) //赋值函数
{
if (&other == this)
{
return *this;
}
else
{
delete []m_data;
m_data = NULL;
int len = strlen(other.m_data);
m_data = new char[len+1];
strcpy(m_data, other.m_data);
return *this;
}
}
};
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