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ارور در تابعی مربوط به operator overloding

silver boy

silver boy

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تاریخ عضویت
7 می 2011
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سلام این سورس کد مربوط به سربار گذاری عملگر هاست دو تا ازش نوشتم ولی اور هاش باهم فرق می کنه لطفا کمک کنید

کد: 
#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>

class string{
friend ostream & operator<<(ostream & , const string &);
friend istream & operator>>(istream & , string &);
public:
string();
void getstring();
string& operator = (cost string &);
string & operator +=(const string &);
bool operator ! () const;
bool operator == (const string &) const ;
bool operator < (const string &) const ;
bool operator = (const string &) const ;
bool operator > (const string &) const ;
bool operator <= (const string &) const ;
bool operator >= (const string &) const ;
bool getlength() const ;
private:
int length;
char st[80];
void setstring (char *);};
string::string (){
st[0]='\0';}
void string ::getstring (){
cout << "pleease enter string :"<<endl;
gets(st);
this-> getlength();}
string& string::operator=(const string & right){
setstring(rigth.st);
return *this;}
string & string::operator += (const string & right){
strcat (this ->st , right.st);
return *this ;}
bool string:: operator !() const{
return (length==0);}
bool string ::operator ==(const string & right) const{
return(strcmp (st , right.st));}
bool string ::operator !=(const string & right) const{
return!(strcmp(st,right.st))==0);}
bool string ::operator <=(const string & right) const{
return(strcmp(st,right.st)<=0);}
bool string ::operator >(const string & right) const{
return (strcmp(st, right.st)>0);}
bool string ::operator >=(const string & right) const{
return (strcmp(st, right.st)>=0);}
void string ::setstring (const char *st2){
strcpy(st, st2);}
void string::getlength() const{
length= strlen(st);}
ostream & operator << (ostream & output , const string & s){
output<<s.st;
return output;}
istream&operator>>(istream & input , string &s){
input>>s.st;
s.getlength();
return input;}
void main(){
string s1, s2, s3, s4;
cout<<"please enter a string :"<<endl;
cin>>s1;
cout<<"please enter a string :"<<endl;
s2.getstring();
s3=s1; s4=s3; s4=s2;
cout<<"s1==s2?";
cout<<((s1==s2)?"true" : "false")<<endl;
cout<<"(s1>s2)?";
cout<<((s1>s2)?"true" : "false")<<endl;
//else


cout<<"s4 is nul? ";
cout<<((s4!)?"true" : "false")<<endl;
cout<<s1<<endl;
cout<<s2<<endl;
cout<<s3<<endl;
cout<<s4<<endl;}

اینم دومی ش
کد: 
#include <conio.h>
#include <string.h>
#include <stdio.h>
#include <iostream.h>
class string{
friend ostream& operator<<(ostream&,const string &);
friend istream& operator>>(istream&, string &);
public:
string();
void getstring();
string& operator=(const string &);
string& operator+=(const string &);
bool operator!()const;
bool operator==(const string &)const;
bool operator<(const string &)const;
bool operator!=(const string &)const;
bool operator>(const string &)const;
bool operator<=(const string &)const;
bool operator>=(const string &)const;
void getlenght()const;
private:
int lenght;
char st[80];
void setstring(char *);};
string::string()
{
st[0]='\0';}
void string::getstring()
{
cout<<"please enter string:";
gets(st);
this->getlenght();
}
string& string::operator=(const string & right);
{setstring(right.st);
return *this;}
string& string::operator+=(const string & right)
{strcat(this->st,right.st);
return *this;}
bool string::operator!()const
{return(lenght==0);}
bool string::operator ==(const string & right)const
{return(strcmp(st,right.st)==0);}
bool string::operator <(const string & right)const
{return (strcmp(st,right.st)<0);}
bool string::operator !=(const string & right)const
{return !(strcmp(st,right.st)==0);}
bool string::operator <=(const string & right)const
{return (strcmp(st,right.st)<=0);}
bool string::operator >(const string & right)const
{return(strcmp(st,right.st)>0);}
bool string::operator >=(const string & right)const
{return(strcmp(st,right.st)<=0);}
void string::setstring(const char *st2)
{strcpy(st,st2);}
void string::getlenght() const
{lenght=strlen(st);}
ostream& operator<<(ostream&output,const string & s)
{output<<s.st;
return output;}
istream& operator>>(istream&input,string& s)
{input>>s.st;
s.getlenght();
return input;}
void main(){
string s1,s2,s3,s4;
cout<<"please enter a string:"<<endl;
cin>>s1;
cout<<"please enter a string:"<<endl;
s2.getstring();
s3=s1;
s4=s3;
s4+=s2;
cout<<"s1==s2?";
cout<<((s1==s2)?"true":"false")<<endl;
cout<<"(s1>s2)?";
cout<<((s4>s2)?"true":"false")<<endl;
cout<<"s4 is NULL?";
cout<<((s4)!:?"true":"false")<<endl;
cout<<s1<<endl;
cout<<s2<<endl;
cout<<s3<<endl;
cout<<s4<<endl;}
این دومی 2 تا اور میده:wacko:
 
>-->O

>-->O

همکار بازنشسته
تاریخ عضویت
25 نوامبر 2009
نوشته‌ها
2,530
لایک‌ها
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محل سکونت
㋡ همین جا ㋡
ارورهای هم که میده رو بنویسید
 
Datis0

Datis0

Registered User
تاریخ عضویت
7 ژوئن 2007
نوشته‌ها
497
لایک‌ها
42
محل سکونت
Esfahan
به نقل از silver boy :
سلام این سورس کد مربوط به سربار گذاری عملگر هاست دو تا ازش نوشتم ولی اور هاش باهم فرق می کنه لطفا کمک کنید

کد: 
#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>

class string{
friend ostream & operator<<(ostream & , const string &);
friend istream & operator>>(istream & , string &);
public:
string();
void getstring();
string& operator = (cost string &);
string & operator +=(const string &);
bool operator ! () const;
bool operator == (const string &) const ;
bool operator < (const string &) const ;
bool operator = (const string &) const ;
bool operator > (const string &) const ;
bool operator <= (const string &) const ;
bool operator >= (const string &) const ;
bool getlength() const ;
private:
int length;
char st[80];
void setstring (char *);};
string::string (){
st[0]='\0';}
void string ::getstring (){
cout << "pleease enter string :"<<endl;
gets(st);
this-> getlength();}
string& string::operator=(const string & right){
setstring(rigth.st);
return *this;}
string & string::operator += (const string & right){
strcat (this ->st , right.st);
return *this ;}
bool string:: operator !() const{
return (length==0);}
bool string ::operator ==(const string & right) const{
return(strcmp (st , right.st));}
bool string ::operator !=(const string & right) const{
return!(strcmp(st,right.st))==0);}
bool string ::operator <=(const string & right) const{
return(strcmp(st,right.st)<=0);}
bool string ::operator >(const string & right) const{
return (strcmp(st, right.st)>0);}
bool string ::operator >=(const string & right) const{
return (strcmp(st, right.st)>=0);}
void string ::setstring (const char *st2){
strcpy(st, st2);}
void string::getlength() const{
length= strlen(st);}
ostream & operator << (ostream & output , const string & s){
output<<s.st;
return output;}
istream&operator>>(istream & input , string &s){
input>>s.st;
s.getlength();
return input;}
void main(){
string s1, s2, s3, s4;
cout<<"please enter a string :"<<endl;
cin>>s1;
cout<<"please enter a string :"<<endl;
s2.getstring();
s3=s1; s4=s3; s4=s2;
cout<<"s1==s2?";
cout<<((s1==s2)?"true" : "false")<<endl;
cout<<"(s1>s2)?";
cout<<((s1>s2)?"true" : "false")<<endl;
//else


cout<<"s4 is nul? ";
cout<<((s4!)?"true" : "false")<<endl;
cout<<s1<<endl;
cout<<s2<<endl;
cout<<s3<<endl;
cout<<s4<<endl;}

اینم دومی ش
کد: 
#include <conio.h>
#include <string.h>
#include <stdio.h>
#include <iostream.h>
class string{
friend ostream& operator<<(ostream&,const string &);
friend istream& operator>>(istream&, string &);
public:
string();
void getstring();
string& operator=(const string &);
string& operator+=(const string &);
bool operator!()const;
bool operator==(const string &)const;
bool operator<(const string &)const;
bool operator!=(const string &)const;
bool operator>(const string &)const;
bool operator<=(const string &)const;
bool operator>=(const string &)const;
void getlenght()const;
private:
int lenght;
char st[80];
void setstring(char *);};
string::string()
{
st[0]='\0';}
void string::getstring()
{
cout<<"please enter string:";
gets(st);
this->getlenght();
}
string& string::operator=(const string & right);
{setstring(right.st);
return *this;}
string& string::operator+=(const string & right)
{strcat(this->st,right.st);
return *this;}
bool string::operator!()const
{return(lenght==0);}
bool string::operator ==(const string & right)const
{return(strcmp(st,right.st)==0);}
bool string::operator <(const string & right)const
{return (strcmp(st,right.st)<0);}
bool string::operator !=(const string & right)const
{return !(strcmp(st,right.st)==0);}
bool string::operator <=(const string & right)const
{return (strcmp(st,right.st)<=0);}
bool string::operator >(const string & right)const
{return(strcmp(st,right.st)>0);}
bool string::operator >=(const string & right)const
{return(strcmp(st,right.st)<=0);}
void string::setstring(const char *st2)
{strcpy(st,st2);}
void string::getlenght() const
{lenght=strlen(st);}
ostream& operator<<(ostream&output,const string & s)
{output<<s.st;
return output;}
istream& operator>>(istream&input,string& s)
{input>>s.st;
s.getlenght();
return input;}
void main(){
string s1,s2,s3,s4;
cout<<"please enter a string:"<<endl;
cin>>s1;
cout<<"please enter a string:"<<endl;
s2.getstring();
s3=s1;
s4=s3;
s4+=s2;
cout<<"s1==s2?";
cout<<((s1==s2)?"true":"false")<<endl;
cout<<"(s1>s2)?";
cout<<((s4>s2)?"true":"false")<<endl;
cout<<"s4 is NULL?";
cout<<((s4)!:?"true":"false")<<endl;
cout<<s1<<endl;
cout<<s2<<endl;
cout<<s3<<endl;
cout<<s4<<endl;}
این دومی 2 تا اور میده:wacko:
کلیک کنید تا بازشود...
تو لینوکسم نمی تونم conio کامپایل کنم همین طوری یه نگاه کلی انداحنم ( تو هم نو هم بود حال نداشتم بخونم :دی ) ولی اولی خیلی مشکل داره مثلا اسپیس بعد از operator غیر مجازه تو دومی درسته
با چی کامپایل می کنی و ارور ها چیه ؟؟ تا کمکت کنیم :)
 
silver boy

silver boy

Registered User
تاریخ عضویت
7 می 2011
نوشته‌ها
56
لایک‌ها
0
کد: 
#include <iostream.h>
#include <conio.h>
#include <stdio.h>

class string{
friend ostream & operator<<(ostream & , const string &);
friend istream & operator>>(istream & , string &);
public:
string();
void getstring();
[COLOR="Yellow"]string & operator = (cost string &);[/COLOR]
string & operator +=(const string &);
bool operator ! () const;
bool operator == (const string &) const ;
bool operator < (const string &) const ;
bool operator = (const string &) const ;
bool operator > (const string &) const ;
bool operator <= (const string &) const ;
bool operator >= (const string &) const ;
bool getlength() const ;
private:
int lenghth;
char st[80];
void setstring (char *);};
string::string (){
st[0]='\0';}
void string ::getstring (){
cout << "pleease enter string :"<<endl;
gets(st);
this-> getlength()}
[COLOR="Yellow"]string & string ::operator =(const string & right){[/COLOR]
setstring(rigth.st);
return *this;}
string & string::operator += (const string & right){
str cat (this ->st , right.st);
return *this ;}
bool string:: operator !() const{
return (length==0);}
bool string ::operator ==(const string & right) const{
return(strcmp (st , right.st)<0;)}
[COLOR="Yellow"]bool string ::operator !=(const string & right) const{[/COLOR]
return!(strcmp(st,right.st))==0);}
bool string ::operator <=(const string & right) const{
return(strcmp(st,right.st)<=0);}
bool string ::operator >(const string & right) const{
return (strcmp(st, right.st)>0)}
bool string ::operator >=(const string & right) const{
return (strcmp(st, right.st)>=0)}
[COLOR="Yellow"]void string ::setstring (const char *st2){[/COLOR]
strcpy(st, st2);}
[COLOR="Yellow"]void string::gft length() const{[/COLOR]
[COLOR="Yellow"]lenght= strlen(st);}[/COLOR]
ostram & operator << (ostream & output , const string & s){
output<<s.st;
return output;}
istream&operator>>(istream & input , string &s){
input>>s.st;
s.getlength();
return input;}
void main{
string s1, s2, s3, s4;
cout<<"please enter a string :"<<endl;
cin>>s1;
cout<<"please enter a string :"<<endl;
s2.getstring();
s3=s1; s4=s3; s4=s2;
cout<<"s1==s2?";
cout<<((s1==s2)?"true" : "false")<<endl;
cout<<"(s1>s2)?";
cout<<((s1>s2)?"true" : "false")<<endl;
//else


coout<<"s4 is nul? ";
[COLOR="Yellow"]cout<<((s4!)?:"true" : "false")<<endl;[/COLOR]
cout<<s1<<endl;
cout<<s2<<endl;
cout<<s3<<endl;
cout<<s4<<endl;}

expected
string::eek:perator=(const string & ) is not amember of 'string'
string::eek:perator!=(const string & ) is not amember of 'string'
string ::setstring (const char *) is not member of string
string::getlength() const is not member of string
cannot modify a const object
Fuction should return a value
expected

کد: 
#include <conio.h>
#include <string.h>
#include <stdio.h>
#include <iostream.h>
class string{
friend ostream& operator<<(ostream&,const string &);
friend istream& operator>>(istream&, string &);
public:
string();
void getstring();
string& operator=(const string &);
string& operator+=(const string &);
bool operator!()const;
bool operator==(const string &)const;
bool operator<(const string &)const;
bool operator!=(const string &)const;
bool operator>(const string &)const;
bool operator<=(const string &)const;
bool operator>=(const string &)const;
void getlenght()const;
private:
int lenght;
char st[80];
void setstring(char *);};
string::string()
{
st[0]='\0';}
void string::getstring()
{
cout<<"please enter string:";
gets(st);
this->getlenght();
}
[COLOR="Yellow"]string& string::operator=(const string & right);[/COLOR]
[COLOR="Yellow"]{setstring(right.st);[/COLOR]
return *this;}
string& string::operator+=(const string & right)
{strcat(this->st,right.st);
return *this;}
bool string::operator!()const
{return(lenght==0);}
bool string::operator ==(const string & right)const
{return(strcmp(st,right.st)==0);}
bool string::operator <(const string & right)const
{return (strcmp(st,right.st)<0);}
bool string::operator !=(const string & right)const
{return !(strcmp(st,right.st)==0);}
bool string::operator <=(const string & right)const
{return (strcmp(st,right.st)<=0);}
bool string::operator >(const string & right)const
{return(strcmp(st,right.st)>0);}
bool string::operator >=(const string & right)const
{return(strcmp(st,right.st)<=0);}
void string::setstring(const char *st2)
{strcpy(st,st2);}
void string::getlenght() const
{lenght=strlen(st);}
ostream& operator<<(ostream&output,const string & s)
{output<<s.st;
return output;}
istream& operator>>(istream&input,string& s)
{input>>s.st;
s.getlenght();
return input;}
void main(){
string s1,s2,s3,s4;
cout<<"please enter a string:"<<endl;
cin>>s1;
cout<<"please enter a string:"<<endl;
s2.getstring();
s3=s1;
s4=s3;
s4+=s2;
cout<<"s1==s2?";
cout<<((s1==s2)?"true":"false")<<endl;
cout<<"(s1>s2)?";
cout<<((s4>s2)?"true":"false")<<endl;
cout<<"s4 is NULL?";
cout<<((s4)!:?"true":"false")<<endl;
cout<<s1<<endl;
cout<<s2<<endl;
cout<<s3<<endl;
cout<<s4<<endl;}

Class member 'string::eek:perator=(const string &)' declared outside its class
Declaration terminated incorrectly
 
silver boy

silver boy

Registered User
تاریخ عضویت
7 می 2011
نوشته‌ها
56
لایک‌ها
0
به نقل از Datis0 :
تو لینوکسم نمی تونم conio کامپایل کنم همین طوری یه نگاه کلی انداحنم ( تو هم نو هم بود حال نداشتم بخونم :دی ) ولی اولی خیلی مشکل داره مثلا اسپیس بعد از operator غیر مجازه تو دومی درسته
با چی کامپایل می کنی و ارور ها چیه ؟؟ تا کمکت کنیم :)
کلیک کنید تا بازشود...
ممنون از کمکتون ولی متوجه نشدم کجا رو گفتید:blush:
من با بورلند می نویسم
 
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