1 #include<iostream>
2 #include<cstdio>
3 #include<queue>
4 #include<vector>
5 using namespace std;
6
7 //定义比较结构
8 struct cmp1
9 {
10 bool operator ()(int &a,int &b)
11 {
12 return a>b;//最小值优先
13 }
14 };
15
16 struct cmp2
17 {
18 bool operator ()(int &a,int &b)
19 {
20 return a<b;//最大值优先
21 }
22 };
23
24 //自定义数据结构
25 struct number1
26 {
27 int x;
28 bool operator < (const number1 &a) const
29 {
30 return x>a.x;//最小值优先
31 }
32 };
33 struct number2
34 {
35 int x;
36 bool operator < (const number2 &a) const
37 {
38 return x<a.x;//最大值优先
39 }
40 };
41 int a[]= {14,10,56,7,83,22,36,91,3,47,72,0};
42 number1 num1[]= {14,10,56,7,83,22,36,91,3,47,72,0};
43 number2 num2[]= {14,10,56,7,83,22,36,91,3,47,72,0};
44
45 int main()
46 {
47 priority_queue<int>que;//采用默认优先级构造队列
48
49 priority_queue<int,vector<int>,cmp1>que1;//最小值优先
50 priority_queue<int,vector<int>,cmp2>que2;//最大值优先
51
52 priority_queue<int,vector<int>,greater<int> >que3;//注意“>>”会被认为错误，
53 priority_queue<int,vector<int>,less<int> >que4;////最大值优先
54
55 priority_queue<number1>que5; //最小优先级队列
56 priority_queue<number2>que6; //最大优先级队列
57
58 int i;
59 for(i=0; a[i]; i++)
60 {
61 que.push(a[i]);
62 que1.push(a[i]);
63 que2.push(a[i]);
64 que3.push(a[i]);
65 que4.push(a[i]);
66 }
67 for(i=0; num1[i].x; i++)
68 que5.push(num1[i]);
69 for(i=0; num2[i].x; i++)
70 que6.push(num2[i]);
71
72
73 printf("采用默认优先关系:
(priority_queue<int>que;)
");
74 printf("Queue 0:
");
75 while(!que.empty())
76 {
77 printf("%3d",que.top());
78 que.pop();
79 }
80 puts("");
81 puts("");
82
83 printf("采用结构体自定义优先级方式一:
(priority_queue<int,vector<int>,cmp>que;)
");
84 printf("Queue 1:
");
85 while(!que1.empty())
86 {
87 printf("%3d",que1.top());
88 que1.pop();
89 }
90 puts("");
91 printf("Queue 2:
");
92 while(!que2.empty())
93 {
94 printf("%3d",que2.top());
95 que2.pop();
96 }
97 puts("");
98 puts("");
99 printf("采用头文件functional内定义优先级:
(priority_queue<int,vector<int>,greater<int>/less<int> >que;)
");
100 printf("Queue 3:
");
101 while(!que3.empty())
102 {
103 printf("%3d",que3.top());
104 que3.pop();
105 }
106 puts("");
107 printf("Queue 4:
");
108 while(!que4.empty())
109 {
110 printf("%3d",que4.top());
111 que4.pop();
112 }
113 puts("");
114 puts("");
115 printf("采用结构体自定义优先级方式二:
(priority_queue<number>que)
");
116 printf("Queue 5:
");
117 while(!que5.empty())
118 {
119 printf("%3d",que5.top());
120 que5.pop();
121 }
122 puts("");
123 printf("Queue 6:
");
124 while(!que6.empty())
125 {
126 printf("%3d",que6.top());
127 que6.pop();
128 }
129 puts("");
130 return 0;
131 }
132 /*
133 运行结果 ：
134 采用默认优先关系:
135 (priority_queue<int>que;)
136 Queue 0:
137 91 83 72 56 47 36 22 14 10 7 3
138
139 采用结构体自定义优先级方式一:
140 (priority_queue<int,vector<int>,cmp>que;)
141 Queue 1:
142 3 7 10 14 22 36 47 56 72 83 91
143 Queue 2:
144 91 83 72 56 47 36 22 14 10 7 3
145
146 采用头文件"functional"内定义优先级:
147 (priority_queue<int,vector<int>,greater<int>/less<int> >que;)
148 Queue 3:
149 3 7 10 14 22 36 47 56 72 83 91
150 Queue 4:
151 91 83 72 56 47 36 22 14 10 7 3
152
153 采用结构体自定义优先级方式二:
154 (priority_queue<number>que)
155 Queue 5:
156 3 7 10 14 22 36 47 56 72 83 91
157 Queue 6:
158 91 83 72 56 47 36 22 14 10 7 3
159 */
