数据结构-顺序队列

 1 #include <iostream>
 2 #include <stdlib.h>
 3 using namespace std;
 4
 5 #define maxSize 20
 6
 7 typedef struct
 8 {
 9     int data[maxSize];
10     int front;
11     int rear;
12 }SqQueue;
13
14 void InitQueue(SqQueue &Q)
15 {
16     Q.front=Q.rear=0;
17 }
18
19 int IsEmpty(SqQueue Q)
20 {
21     if(Q.front==Q.rear)
22         return 1;
23     else
24         return 0;
25 }
26
27 int EnQueue(SqQueue &Q,int e)
28 {
29     if((Q.rear+1)%maxSize==Q.front)
30         return 0;//队满
31     Q.rear=(Q.rear+1)%maxSize;
32     Q.data[Q.rear]=e;
33     return 1;
34 }
35
36 int DeQueue(SqQueue &Q,int &e)
37 {
38     if(Q.front==Q.rear)
39         return 0;
40     Q.front=(Q.front+1)%maxSize;
41     e=Q.data[Q.front];
42     return 1;
43 }
44
45 int Print(SqQueue Q)
46 {
47     if(Q.front==Q.rear)
48     {
49         cout<<"\n队空！\n";
50         return 0;
51     }
52     cout<<"队中元素依次为：\n";
53     while(Q.front!=Q.rear)
54     {
55         (++Q.front)%maxSize;
56         cout<<"  "<<Q.data[Q.front] <<"  ";
57     }
58     return 1;
59 }
60
61 int main()
62 {
63     int i,e;
64     SqQueue Q;
65     InitQueue(Q);
66     if(IsEmpty(Q)==1)
67         cout<<"\n队空！\n";
68     else
69         cout<<"\n队非空！\n";
70
71     cout<<"\n---------------------------------\n";
72     for(i=0;i<10;++i)
73         EnQueue(Q,i);
74     Print(Q);
75     if(IsEmpty(Q)==1)
76         cout<<"\n队空！\n";
77     else
78         cout<<"\n队非空！\n";
79     cout<<"\n---------------------------------\n";
80
81     cout<<"依次出队5个元素为：\n";
82     for(i=0;i<5;++i)
83     {
84         DeQueue(Q,e);
85         cout<<"  "<<e<<"  ";
86     }
87     cout<<endl;
88     Print(Q);
89     if(IsEmpty(Q)==1)
90         cout<<"\n队空！\n";
91     else
92         cout<<"\n队非空！\n";
93     cout<<"\n---------------------------------\n";
94
95     return 0;
96 }