I need help. I want to print data in list in c++. First i inserted some information into the list and don't know to print them | Sololearn: Learn to code for FREE!

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I need help. I want to print data in list in c++. First i inserted some information into the list and don't know to print them

class List1{ public: Park info; List1* next; }; List1* last = NULL; List1* head = NULL; List1* potr = NULL; for(int i =0; i<3; i++){ if(head==0){ cout<<"Ro'yxat bo'sh"<<endl; continue; } cout<<"******Ro'yxat*******"<<endl<<endl; potr[i] = head[i]; while(1){ cout<<potr[i].info<<endl; if(potr[i].next ==0) break; potr[i] = potr[i].next; } cout<<endl; continue; } Here 'potr[i] = potr[i].next' is giving an error. What should I do?

11/25/2020 7:49:21 PM

Fayzullo Abduhakimov

23 Answers

New Answer

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Where is definition of `Park` in class `List1`? Park info; // <-- Undefined Park

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Fayzullo Abduhakimov You need to save your code in SoloLearn first. Then share just the saved code link here. That way you don't have to worry your code get truncated because it's too big. Just follow the below guide 👇 https://www.sololearn.com/post/75089/?ref=app

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Ok thanks 😊 for attention

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Try potr[i]->next The dot is used to acces a member of a structure. The arrow is used to access a member of a structure through a pointer to that structure. if potr[i] is a pointer to a structure you have to use the arrow

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https://code.sololearn.com/cpQE1cFMoxb9/?ref=app

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It's from data-structures. I mustn't use 'list'

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#include <iostream> #include <sstream> using namespace std; class Park { public: int nomeri; string FIO; int yonalish_nomeri; string Strings; void kirit(int number, string FIO, int yo_nomer){ this->nomeri = number; this->FIO = FIO; this->yonalish_nomeri = yo_nomer; } void chiqar(){ cout<<"Nomeri: "<<nomeri<<endl; cout<<"FIO: "<<FIO<<endl; cout<<"Yo'nalish nomeri': "<<yonalish_nomeri<<endl; } operator const char*(){ ostringstream formatting; formatting<<nomeri<<endl; formatting<<FIO<<endl; formatting<<yonalish_nomeri<<endl; Strings = formatting.str(); return Strings.c_str(); } }; class List1{ public: Park info; List1* next; }; class List2{ public: Park info; List2* next; }; List1* lst=NULL; List1* last = NULL; List1* head = NULL; List1* potr = NULL; int main(){ Park car[3]; car[0].kirit(321,"Abdullayev Abdulla", 56); car[1].kirit(743,"Sobirov Jamshid", 87); c

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int main(){ Park car[3]; car[0].kirit(321,"Abdullayev Abdulla", 56); car[1].kirit(743,"Sobirov Jamshid", 87); car[2].kirit(823,"Nosirov Elyor", 70); List1* p = new List1[3]; for(int i=0; i<3; i++){ p[i].info = car[i]; p[i].next = NULL; if(lst==NULL){ *lst = p[i]; *last = p[i]; } else{ last->next = &p[i]; last = &p[i]; } } for(int i =0; i<3; i++){ if(head==0){ cout<<"Ro'yxat bo'sh"<<endl; continue; }

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I couldn't send full code at once

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Words were limited

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Ok. Can anybody help me solve this problem?

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Fayzullo Abduhakimov as Ipang said, you need to share your code properly. Like that https://code.sololearn.com/csruO5TPQa14/?ref=app Just copy/paste your code in the playground and then share it with the '+" button that you can see while writing a comment. You'll find your code in your code bits

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I think i managed to send the code. And now please help what to do

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I should insert all data into the linear list and then print them all.

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And also give advice how to remove a data in the list if possible

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I need help!

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in line 90 potr[i] = potr[i]->next; Since potr[i] is not a pointer, it was right to use the dot instead of the arrow. However potr[i].next is a pointer and you can't assign it to potr[i] I have no idea of what the program does. If your intentions were to assign to potr[i] what is pointed by potr[i].next, you can do it in this way: potr[i] = *(potr[i].next); If you wanted to change the address of potr[i] with that stored in potr[i].next, you can't do it because since potr is an array, it is a constant pointer

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Create a program that consists of dynamic information about the bus in the bus fleet. Information about each bus includes: - bus number (number); - The driver's name; - direction number; The program should provide the following: - provide preliminary information about all buses in the fleet in the form of a list; - When each bus leaves the fleet, its number is entered and the information about it is removed from the list of buses in the fleet and added to the list of buses on the route; https://code.sololearn.com/cpQE1cFMoxb9/?ref=app

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I tried to solve this problem.

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I don't know wait for the answer of someone more familiar with c++.