strings.cpp

自定义字符串类实现

最新推荐文章于 2024-12-16 23:21:40 发布

原创最新推荐文章于 2024-12-16 23:21:40 发布 · 390 阅读

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#object #string #constructor #stream #character #delete

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name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> class Strings {
   char *p;
   int size;
public:
   Strings(char *str);
   Strings(void);
   Strings(const Strings &obj);           // Copy constructor
   ~Strings(void) {delete [] p;}

friend ostream &operator<<(ostream &stream, Strings &obj);
friend istream &operator>>(istream &stream, Strings &obj);

   Strings operator=(Strings &obj);       // assign a Strings object
   Strings operator=(char *s);            // assign a quoted string
   Strings operator+(Strings &obj);       // concatenate a Strings object
   Strings operator+(char *s);            // concatenate a quoted string
   friend Strings operator+(char *s, Strings &obj);
            /* concatenates a quoted string with a Strings object */

Strings operator-(Strings &obj); // subtract a Strings object
Strings operator-(char *s); // subtract a quoted string

/* relational operators between Strings objects. Note that the operators could
just as easily return bool, rather than int */

   int operator==(Strings &obj) {return !strcmp(p, obj.p);}
   int operator!=(Strings &obj) {return strcmp(p, obj.p);}
   int operator<(Strings &obj) {return strcmp(p, obj.p) < 0;}
   int operator>(Strings &obj) {return strcmp(p, obj.p) > 0;}
   int operator<=(Strings &obj) {return strcmp(p, obj.p) <= 0;}
   int operator>=(Strings &obj) {return strcmp(p, obj.p) >= 0;}

/* relational operators between Strings object and a quoted character string.
Note that the operators could just as easily return bool, rather than int */

   int operator==(char *s) {return !strcmp(p, s);}
   int operator!=(char *s) {return strcmp(p, s);}
   int operator<(char *s) {return strcmp(p, s) < 0;}
   int operator>(char *s) {return strcmp(p, s) > 0;}
   int operator<=(char *s) {return strcmp(p, s) <= 0;}
   int operator>=(char *s) {return strcmp(p, s) >= 0;}

int strsize(void) {return strlen(p);} // return string size
void makestr(char *s) (strcpy(s, p);} // make quoted string from Strings object

operator char *(void) {return p;} // conversion to char
}