string215.h

#ifndef STRING215_H_INCLUDED
#define STRING215_H_INCLUDED

class string215
{
public:
    // Create a string215 of length zero (null terminator only).
    string215();
    // Create a string215 that is a (deep) copy of another.
    string215(const string215 &other);
    // Destroy a string215 and de-allocate its memory.
    ~string215();

    // Return the length of a string215, not counting the null terminator.
    int length() const;
    // Return the character at a given index.  Returns '\0' if the
    // index is out of bounds.
    char getchar(int index) const;
    // Set the character at a given index and return false.
    bool setchar(int index, char newchar);
    // Check whether two strings contain the same characters.
    bool equals(const string215 &other) const;
    // Add a suffix to the end of this string.  Allocates and frees memory.
    void append(const string215 &suffix);

    // Return a pointer to the raw character data (not a copy).
    const char *c_str() const;
    // Replace the contents of this string215 with a copy of a C
    // string.  Allocates and frees memory.
    void replace(const char *in_str);
    // Create a string215 that is a (deep) copy of a C string.
    string215(const char *in_str);

    // Return the length of a string
    int str_len(const char *str) const;
    // Return true if the two C strings contain the same sequence of characters.
    bool equal_string(const char *first, const char *second) const;
    // Make and return a dynamically-allocated copy of the input C string.
    char *copy_string(const char *input);
private:
    // Pointer to a null-terminated character array storing this
    // object's content.
    char *data;
};

#endif