-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathDeque.cpp
More file actions
173 lines (141 loc) Β· 4.98 KB
/
Deque.cpp
File metadata and controls
173 lines (141 loc) Β· 4.98 KB
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
#include <iostream>
#include <stdio.h>
using namespace std;
#define size 5
int deque[size];
int f = -1;
int r = -1;
/*βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ*/
// enqueue_front function will insert the value from the front
void enqueue_front(int x){
if((f == 0 && r == size - 1) || (f == r + 1)){
cout << "Deque is full";
}
else if((f == -1) && (r == -1)){
f = r = 0;
deque[f] = x;
}
else if(f == 0){
f = size - 1;
deque[f] = x;
}
else{
f--;
deque[f] = x;
}
}
/*βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ*/
// enqueue_rear function will insert the value from the rear
void enqueue_rear(int x){
if((f == 0 && r == size - 1) || (f == r + 1)){
cout << "Deque is full";
}
else if((f == -1) && (r == -1)){
r = 0;
deque[r] = x;
}
else if(r == size - 1){
r = 0;
deque[r] = x;
}
else{
r++;
deque[r] = x;
}
}
/*βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ*/
// display function prints all the value of deque.
void display(){
if((f == -1) && (r == -1)){
cout << "Deque is empty";
}
else{
int i = f;
cout << "Elements in the Deque : ";
while(i != r){
cout << deque[i] << " ";
i = (i + 1) % size;
}
cout << deque[r];
}
cout << endl;
}
/*βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ*/
// dequeue_front() function deletes the element from the front
void dequeue_front(){
if((f == -1) && (r == -1)){
cout << "Deque is empty";
}
else if(f == r){
cout << "\nThe deleted element is " << deque[f];
f = -1;
r = -1;
}
else if(f == (size - 1)){
cout << "\nThe deleted element is " << deque[f];
f = 0;
}
else{
cout << "\nThe deleted element is " << deque[f];
f = f + 1;
}
cout << endl;
}
/*βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ*/
// dequeue_rear() function deletes the element from the rear
void dequeue_rear(){
if((f == -1) && (r == -1)){
cout << "Deque is empty";
}
else if(f == r){
cout << "\nThe deleted element is " << deque[r];
f = -1;
r = -1;
}
else if(r == 0){
cout << "\nThe deleted element is " << deque[r];
r = size - 1;
}
else{
cout << "\nThe deleted element is " << deque[r];
r = r - 1;
}
cout << endl;
}
/*βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ*/
int main(){
int code, num;
do{
cout << "Enter \n1 ββββ> EnQueue (front)\n2 ββββ> EnQueue (rear)\n3 ββββ> DeQueue (front)\n4 ββββ> DeQueue (rear)\n5 ββββ> Display\n6 ββββ> Exit\n";
cout << "Please enter your choice : ";
cin >> num;
switch(num){
case 1:
cout << "\nEnter a Number : ";
cin >> code;
enqueue_front(code);
break;
case 2:
cout << "\nEnter a Number : ";
cin >> code;
enqueue_rear(code);
break;
case 3:
dequeue_front();
break;
case 4:
dequeue_rear();
break;
case 5:
cout << endl;
display();
break;
case 6:
break;
default :
cout << "Enter a number between 1 and 6\n";
}
cout << endl;
}while(num != 6);
return 0;
}