string.h


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/* string.h
 *
 */

#ifndef _MYSTRING_
#define _MYSTRING_

#include <cstring>
#include <iostream>

using namespace std;

class MyString
{
    friend bool operator==(const MyString&, const MyString &);
    friend ostream& operator<<(ostream&, const MyString &);

    private:
        char *str_;
        int length_;
        MyString(int);

    public:
        MyString();
        MyString(char);
        MyString(const char *);
        MyString(const MyString &);
        MyString& operator=(const MyString &);
        ~MyString();

        int length() const;
        int indexOf(char, int = 0) const;
        bool isSubstring(const MyString &) const;
        bool isSubstring(const char *) const;
        MyString& concat(const MyString &);
        MyString& concat(const char *);
        void printStr(void) const;

        MyString operator!() const;
        char& operator[](int);
        char operator[](int) const;
};

bool operator==(const MyString&, const MyString &);
ostream& operator<<(ostream&, const MyString &);

inline MyString::MyString()
{
    length_ = 0;
    str_ = new char[1];
    str_[0] = '\0';
}

inline MyString::MyString(char ch)
{
    length_ = 1;
    str_ = new char[2];
    str_[0] = ch;
    str_[1] = '\0';
}

inline int MyString::length() const
{
    return length_;
}

inline void MyString::printStr(void) const
{
    cout << "length: " << length_ << ", value: \"" << str_ <<"\"";
}

#endif