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队列的定义：队列(queue)维护了一组对象，进入队列的对象被放置在尾部，下一个被取出的元素则取自队列的首部。priority_queue特别之处在于，允许用户为队列中存储的元素设置优先级。这种队列不是直接将新元素放置在队列尾部，而是放在比它优先级低的元素前面。标准库默认使用b;//最小值优先
}
};
struct cmp2{
bool operator ()(int &a,int &b){
return aa.x;//最小值优先
}
};
struct number2{
int x;
bool operator < (const number2 &a) const {
return x>”会被认为错误，
priority_queueque4;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_queueque;)/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_queueque;)/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_queueque;)
Queue 1:
7 10 14 22 36 47 56 72 83 91
Queue 2:
83 72 56 47 36 22 14 10 7 3
采用头文件"functional"内定义优先级:
(priority_queueque;)
Queue 3:
7 10 14 22 36 47 56 72 83 91
Queue 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 91
Queue 6:
83 72 56 47 36 22 14 10 7 3
*/
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