как-то так
C++ |
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
| #include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace std;
struct LIBRARY
{
char nomer[30];
char FIO[30];
char nazvanie[40];
int Year;
int kolvo;
};
struct STR
{
LIBRARY *Library;
STR *next;
};
STR * create(LIBRARY * Library) //начальное формирование списка
{
STR *root=new STR;
root->Library=Library;
root->next=NULL;
return root;
}
void add(LIBRARY *Library, STR* root) //добавление нового элемента списка
{
while(root->next)
root=root->next;
root->next=new STR;
root->next->Library=Library;
root->next->next=NULL;
}
void printLIBRARY(LIBRARY *Library) //вывод на экран
{
cout<<"Nomer => "<<Library->nomer<<endl;
cout<<"FIO => "<<Library->FIO<<endl;
cout<<"Nazvanie => "<<Library->nazvanie<<endl;
cout<<"Year => "<<Library->Year<<endl;
cout<<"Kolvo => "<<Library->kolvo<<endl;
cout<<endl;
}
LIBRARY * makeLIBRARY() //добавление книги
{
cout<<"Enter book data:"<<endl;
LIBRARY *Library=new LIBRARY;
fflush(stdin);
cout<<"Enter book nomer: => ";
cin.getline(Library->nomer,30);
cout<<"Enter Author's FIO: => ";
cin.getline(Library->FIO,30);
cout<<"Enter book name: => ";
cin.getline(Library->nazvanie,40);
cout<<"Enter made year: => ";
cin>>Library->Year;
cout<<"Enter count of books: => ";
cin>>Library->kolvo;
return Library;
}
int choice()
{
int answer;
cout<<"Main menu"<<endl;
cout<<"1. Add new books to the list"<<endl;
cout<<"2. Print LIBRARY at list"<<endl;
cout<<"3. Search and delete"<<endl;
cout<<"4. Clear all entries"<<endl;
cout<<"5. Exit"<<endl;
cout<<"Enter your choice: ";
cin>>answer;
fflush(stdin);
if(answer>=1 && answer<=5)
return answer;
else
return 0;
}
STR* search_and_del(STR * str)
{
STR *last=str,*root = str;
char qwe[30];
char qw[30], q[1];
cout<<"Enter nomer of book => "<<endl;
cin.getline(qwe,30);
while (root)
{
if (!strcmp(qwe,root->Library->nomer))
{
{
printLIBRARY(root->Library);
cout<<"Do you want clear this entries? (y/n) "<<endl;// Удаление записи
char c;
cin.get(c);
if (c=='y')
{
root->Library=NULL;
if(last==root) str=root->next;
else last->next=root->next;
}
while(cin.get(c) && c!='\n');
last = root;
root=root->next;
}
}
else if (strcmp(qwe,root->Library->nomer))
root=root->next;
}
cout<<"Entries deleted"<<endl;
return str;
}
int main()
{
STR *root=NULL;
int ch;
while(1)
{
ch=choice();
if(ch==1)
{
cout<<endl;
if(root==NULL)
root=create(makeLIBRARY());
else
add(makeLIBRARY(),root);
}
else if(ch==2)
{
cout<<endl;
int i=0;
int N=0;
STR *proot=root;
while (root)
{
N++;
root=root->next;
}
LIBRARY *buf;
LIBRARY **pLibrary=new LIBRARY*[N];
root=proot;
while (root)
{
pLibrary[i]=root->Library;
root=root->next;
i++;
}
root=proot;
for (i=0;i<N;i++)
printLIBRARY(pLibrary[i]);
}
else if(ch==3)
{
root=search_and_del(root);
}
else if(ch==4)
{
cout<<endl;
}
else if(ch==5)
{
break;
cout<<endl;
}
}
return 0;
} |
|
Добавлено через 3 минуты
Ошибка была в том, что вы обнуляли указатель на первый элемент вашего списка при проходе по нему.
Добавлено через 57 секунд
если помог, не забываем про кнопочку "спасибо"