优先队列

#include#include#include#include#includeusing namespace std;//定义比较结构struct cmp1{ bool operator ()(int &a,int &b){ return a>b;//最小值优先 }};struct cmp2{ bool operator ()(int &a,int &b){ return a<b;//最大值优先 }};//自定义数据结构struct number1{ int x; bool operator < (const number1 &a) const { return x>a.x;//最小值优先 }};struct number2{ int x; bool operator < (const number2 &a) const { return x<a.x;//最大值优先 }};int a[]={14,10,56,7,83,22,36,91,3,47,72,0};number1 num1[]={14,10,56,7,83,22,36,91,3,47,72,0};number2 num2[]={14,10,56,7,83,22,36,91,3,47,72,0};int main(){ priority_queueque;//采用默认优先级构造队列 priority_queue<int,vector,cmp1>que1;//最小值优先 priority_queue<int,vector,cmp2>que2;//最大值优先 priority_queue<int,vector,greater >que3;//注意“>>”会被认为错误， priority_queue<int,vector,less >que4;////最大值优先 priority_queueque5; //最小优先级队列 priority_queueque6; //最大优先级队列 int i; for(i=0;a[i];i++){ que.push(a[i]); que1.push(a[i]); que2.push(a[i]); que3.push(a[i]); que4.push(a[i]); } for(i=0;num1[i].x;i++) que5.push(num1[i]); for(i=0;num2[i].x;i++) que6.push(num2[i]); printf("采用默认优先关系:/n(priority_queueque;)/n"); printf("Queue 0:/n"); while(!que.empty()){ printf("%3d",que.top()); que.pop(); } puts(""); puts(""); printf("采用结构体自定义优先级方式一:/n(priority_queue<int,vector,cmp>que;)/n"); printf("Queue 1:/n"); while(!que1.empty()){ printf("%3d",que1.top()); que1.pop(); } puts(""); printf("Queue 2:/n"); while(!que2.empty()){ printf("%3d",que2.top()); que2.pop(); } puts(""); puts(""); printf("采用头文件\"functional\"内定义优先级:/n(priority_queue<int,vector,greater/less >que;)/n"); printf("Queue 3:/n"); while(!que3.empty()){ printf("%3d",que3.top()); que3.pop(); } puts(""); printf("Queue 4:/n"); while(!que4.empty()){ printf("%3d",que4.top()); que4.pop(); } puts(""); puts(""); printf("采用结构体自定义优先级方式二:/n(priority_queueque)/n"); printf("Queue 5:/n"); while(!que5.empty()){ printf("%3d",que5.top()); que5.pop(); } puts(""); printf("Queue 6:/n"); while(!que6.empty()){ printf("%3d",que6.top()); que6.pop(); } puts(""); return 0;}/*运行结果 ：采用默认优先关系:(priority_queueque;)Queue 0:83 72 56 47 36 22 14 10 7 3采用结构体自定义优先级方式一:(priority_queue<int,vector,cmp>que;)Queue 1: 7 10 14 22 36 47 56 72 83 91Queue 2:83 72 56 47 36 22 14 10 7 3采用头文件"functional"内定义优先级:(priority_queue<int,vector,greater/less >que;)Queue 3: 7 10 14 22 36 47 56 72 83 91Queue 4:83 72 56 47 36 22 14 10 7 3采用结构体自定义优先级方式二:(priority_queueque)Queue 5: 7 10 14 22 36 47 56 72 83 91Queue 6:83 72 56 47 36 22 14 10 7 3*/