//string1.cpp

#include <cstring>

#include "string1.h"

using std::cin;

using std::cout;

int String::num_strings = 0;

int String::HowMany()

{

return num_strings;

}

String::String (const char * s)

{

len = std::strlen(s);

str = new char[len + 1];

std::strcpy(str, s);

num_strings++;

}

String::String()

{

len = 4;

str = new char[1];

str[0] = '\0';

num_strings++;

}

String::String(const String & st)

{

num_strings++;

len = st.len;

str = new char [len + 1];

std::strcpy(str, st.str);

}

String::~String()

{

--num_strings;

delete [] str;

}

String & String::operator= (const String & st)

{

if (this == &st)

return *this;

delete [] str;

len = st.len;

str = new char[len + 1];

std::strcpy(str, st.str);

return *this;

}

String & String::operator= (const char * s)

{

delete [] str;

len = std::strlen (s);

str = new char[len + 1];

std::strcpy(str, s);

return *this;

}

char & String::operator[] (int i)

{

return str[i];

}

const char & String::operator[] (int i)const

{

return str[i];

}

bool operator< (const String &st1, const String &st2)

{

return (std::strcmp (st1.str, st2.str) < 0);

}

bool operator> (const String &st1, const String & st2)

{

return st2.str < st1.str;

}

bool operator== (const String &st1, const String &st2)

{

return (std::strcmp (st1.str, st2.str) == 0);

}

ostream & operator<< (ostream & os, const String & st)

{

os << st.str;

return os;

}

istream & operator>> (istream & is, String & st)

{

char temp[String::CINLIM];

if (is)

st = temp;

while (is && is.get() != '\n')

continue;

return is;

}