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2 queue with linked list

vegon (2)
hi guys ... :D

can any one tell me what's the problem in my prog. !!
while the prog. running compiler say " access violation .. "

this my code ...
sorry if iam doing some thing wrong cause it's my first time to write on a website :)

solved :
just forget to make r=NULL ; rf =NUll ; frontm=NUll; frontf=NULL ;
i will keep it may help another one 
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#include <iostream>
#include<conio>
struct stu{
int id;
float gba ;
char gender ;
stu *next ;
}*r ,*rf ;
stu read()
 {stu temp ;
 cout << "enter the id : \t" ;
 cin>> temp.id ;
 cout << "\nenter the gba : \t  "  ;
 cin>> temp.gba   ;
 cout << "\nenter the gender :\t"  ;
 cin>> temp.gender ;
 return temp ;
 }
 enqueue(stu x  )
{stu *temp ;
temp= new stu ;
temp->id=x.id         ;
temp->gba=x.gba       ;
temp->gender=x.gender ;
temp->next=NULL ;
if( (rf==NULL) && (r==NULL))
 {r=temp   ;
 rf= temp ;
 return 0 ;}
 r->next = temp ;
 r=temp ;
}
 bool_empty()
 { if (rf==NULL)  return true ;
 else return false ;
 }
 dequeue()
 { stu * temp ;
 temp =   rf ;
 rf = rf->next ;
 cout<< "id =\t" << temp->id << "gba =\t" << temp->gba << "gender =\t"<< temp->gender << "\n";
 }

main()
{ stu *male , *female , *frontm ,*frontf ;
stu st1 ;
char c , ans ;
male=NULL ;
female =NULL ;

 do
 {cout<< " if the student male press (m) and (f) for female  :  \n" ;
 cin >> c ;
 if ( (c=='m') || (c=='M'))
{st1=read() ;
r=male ;
rf=frontm ;
enqueue(st1) ;
male=r ;
frontm=rf ;
 }
 else if ((c=='f')||(c=='F'))
 {st1=read() ;
r=female ;
rf=frontf ;
enqueue(st1) ;
female=r ;
frontf=rf ;}
 else{ cout<< "you have finished  \n :" ;   }
 cout << "press (y) if there is another student  : " ;
 cin>>ans ;

 }while((ans== 'y')||(ans== 'Y'))         ;


 cout << " data of the male student : \n  "  ;
 rf=frontm ;
while(bool_empty()==false)
{r= male ;
dequeue() ;
}

 cout << " data of the female student : \n  "  ;
 rf=frontf ;
while(bool_empty()==false)
{r=female ;
dequeue() ;
}
getch();
}

Last edited on
popa6200 (48)
tip use code tags (the <> box), also your code is confusing, could use please structure it, and finaly
hi gays ... :D
is sort of offensive.
vegon (2)
popa6200

at first ... i am really so sorry about this mistake :)

and thanks for your help but i can't understand what are you meaning about 'could use please structure it !'

my prog. should make two queue "one for male and another for female " using linked list ,,
i tried another prog. but the same massaged show with another number " like : access violation at 0x4011e0 write of address 0x9 "
Last edited on
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