{"id":560,"date":"2007-03-15T11:30:00","date_gmt":"2007-03-15T03:30:00","guid":{"rendered":"http:\/\/note.systw.net\/note\/?p=560"},"modified":"2023-11-04T11:32:48","modified_gmt":"2023-11-04T03:32:48","slug":"stack-queue","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/560","title":{"rendered":"Stack Queue"},"content":{"rendered":"\n

stack<\/strong>:LIFO(last in first out,\u5f8c\u9032\u5148\u51fa)
\u8aaa\u660e:\u4e00\u7a2e\u6709\u5e8f\u4e32\u5217,\u4f46\u9650\u5236\u63d2\u5165\u904b\u4f5c\u548c\u522a\u9664\u904b\u4f5c\u800c\u5728top(\u9802\u7aef)\u9032\u884c,\u4e5f\u5c31\u662f\u6700\u5f8c\u63d2\u5165\u7684\u8cc7\u6599\u6703\u5148\u88ab\u79fb\u8d70
\u61c9\u7528:\u526f\u7a0b\u5f0f\u7684\u547c\u53eb\u8207\u8fd4\u56de,\u905e\u8ff4\u526f\u7a0b\u5f0f\u7684\u8655\u7406,\u904b\u7b97\u5f0f\u7684\u8a08\u7b97…
\u4e3b\u8981\u904b\u4f5c:\u5ba3\u544a\u4e00\u500b\u7a7a\u5806\u758a,\u63d2\u5165,\u53d6\u51fa,\u5224\u5225\u662f\u5426\u70ba\u7a7a,\u56de\u50b3\u9802\u7aef\u8cc7\u6599…
ps:\u82e5\u5c07\u4f47\u5217\u7684\u63d2\u5165\u904b\u4f5c\u548c\u522a\u9664\u904b\u4f5c\u90fd\u767c\u751f\u5728\u5c3e\u7aef,\u53ca\u53ef\u9054\u5230\u5806\u758a\u7684\u6548\u679c<\/p>\n\n\n\n

\u93c8\u7d50\u8868\u793a\u7684\u904b\u4f5c
void push(int x){
\u3000struct node *temp;
\u3000temp=(struct node *)malloc(sizeof(struct node)); \/\/\u7522\u751f\u65b0\u7bc0\u9ede
\u3000temp->data=x;
\u3000temp->next=top; \/\/\u5c07\u65b0\u7bc0\u9ede\u6307\u5411top\u6240\u6307\u7bc0\u9ede
\u3000top=temp; \/\/\u5c07top\u8b8a\u6578\u6539\u6210\u6307\u5411\u65b0\u7bc0\u9ede
}
int pop(void){
\u3000int x; struct node *temp;
\u3000if(top==null){ printf(stack is empty); } \/\/\u5224\u65b7\u662f\u5426\u70ba\u7a7a
\u3000else{
\u3000\u3000temp=top; \/\/\u5c07temp\u6307\u5411top\u6240\u6307\u7bc0\u9ede
\u3000\u3000top=temp->next; \/\/\u5c07top\u7bc0\u9ede\u8b8a\u6210\u7684\u6307\u5411\u4e0b\u4e00\u500b\u7bc0\u9ede
\u3000\u3000x=temp->data;
\u3000\u3000free(temp); \/\/\u6b78\u9084temp\u6240\u6307\u7bc0\u9ede
\u3000}
\u3000return(x);
}<\/p>\n\n\n\n

\u524d\u5e8f,\u4e2d\u5e8f,\u5f8c\u5e8f\u8f49\u63db\u53ca\u8a08\u7b97
\u4e2d\u5e8f\u8f49\u5f8c\u5e8f
ex:a+e*c\/d-e
1, ((a+((e*c)\/d))-e) \/\/\u4f9d\u904b\u7b97\u9806\u5e8f\u52a0\u62ec\u865f
2 , aec*d\/+e- \/\/\u5c07\u5404\u904b\u7b97\u5b50\u79fb\u5230\u5c0d\u61c9\u7684\u53f3\u62ec\u865f
\u4e2d\u5e8f\u8f49\u524d\u5e8f\u6f14\u7b97\u6cd5
1,\u5c07\u4e2d\u5e8f\u904b\u7b97\u5f0f\u5148\u53cd\u8f49,\u9054\u5230\u7531\u5f8c\u5411\u524d\u8655\u7406\u7684\u9806\u5e8f
2,\u5728\u5c3e\u7aef\u653e\u4e0a\u4e00\u7d50\u675f\u7b26\u865f
3,\u5c07\u503c\u53d6\u51fa\u4e00\u76f4\u5230\u78b0\u5230\u7d50\u675f\u7b26\u865f
4,\u5047\u5982\u503c\uff1d\u6578\u5b57,\u5247\u5c07\u6578\u5b57\u653e\u5165result\u7684\u5806\u758a\u4e2d
\u5047\u5982\u503c\uff1d\u904b\u7b97\u7b26\u865f,\u5247\u5c07\u904b\u7b97\u7b26\u865f\u653e\u5165expr\u7684\u5806\u758a\u4e2d<\/p>\n\n\n\n


…………….<\/p>\n\n\n\n


queue<\/strong>:FIFO(first in first out,\u5148\u9032\u5148\u51fa)
\u8aaa\u660e:\u4e00\u7a2e\u6709\u5e8f\u4e32\u5217\uff0c\u4f46\u9650\u5236\u63d2\u5165\u904b\u4f5c\u5728rear(\u5c3e\u7aef),\u800c\u522a\u9664\u904b\u4f5c\u5728front(\u524d\u7aef),\u4e5f\u5c31\u662f\u7b2c\u4e00\u500b\u63d2\u5165\u7684\u8cc7\u6599\u6703\u5148\u88ab\u79fb\u8d70
\u61c9\u7528:\u5de5\u4f5c\u5143\u7684\u898f\u756b,\u8f38\u5165\u8f38\u51fa\u8981\u6c42\u7684\u8655\u7406,\u96fb\u8166\u6a21\u64ec\u7cfb\u7d71\u7684\u57f7\u884c<\/p>\n\n\n\n

ps:
priority queue
\u5728fifo\u4e2d\u5728\u589e\u52a0\u4e00\u500bpriority\u5143\u7d20
\u7528\u9014:\u63d0\u4f9binsert,delete,search\u904b\u4f5c<\/p>\n\n\n\n

\u7528\u5faa\u5e8f\u8868\u793a\u6cd5\u4f86\u8868\u793a\u4e00\u500b\u4f47\u5217
\u4e8b\u5148\u5ba3\u544a:
datatype queue[1-n]; \/\/\u5ba3\u544a\u80fd\u5b58\u653en\u500b\u8cc7\u6599\u7684\u9663\u5217
int front=1; \/\/\u6307\u5411\u8981\u53d6\u51fa\u8cc7\u6599\u7684\u4f4d\u7f6e
int rear=1; \/\/\u6307\u5411\u8981\u63d2\u5165\u8cc7\u6599\u7684\u4f4d\u7f6e
\u4f7f\u7528\u7dda\u6027\u4f47\u5217\u6642:<\/strong>
rear=rear+1 \/\/\u63d2\u5165\u8cc7\u6599\u6642+1
front=front+1 \/\/\u53d6\u51fa\u8cc7\u6599\u6642+1
\u7576front=rear\u6642\u8868empty
\u800crear=n\u6642\u8868\u793a\u5df1\u6eff,\u82e5\u5de6\u908a\u6709\u7a7a\u9593\u5247\u5c07\u8cc7\u6599\u5de6\u79fb,\u4f46\u9019\u65b9\u6cd5\u5341\u5206\u6c92\u6548\u7387
\u4f7f\u7528\u74b0\u72c0\u4f47\u5217circular\u6642:<\/strong>
rear=(rear mod n)+1 \/\/\u63d2\u5165\u8cc7\u6599\u6642+1,\u4f46\u7576rear\u70ban\u6642,\u4e0b\u4e00\u500b\u63d2\u5165\u8cc7\u6599\u7684\u4f4d\u7f6e\u5c31\u6703\u5728\u6700\u5de6\u908a
front=(front mod n)+1 \/\/\u53d6\u51fa\u8cc7\u6599\u6642+1,\u4f46front\u7684\u503c\u5230n\u5f8c\u6703\u81ea\u52d5\u8b8a\u56de1
\u7576front=rear\u6642\u8868empty
\u5224\u65b7\u662f\u5426\u6709\u6eff\u7684\u65b9\u6cd5:
1,\u53ea\u5141\u8a31n-1\u500b\u8cc7\u6599\u653e\u5165\u4f47\u5217,\u4e5f\u5c31\u662f(rear mod n)+1==front\u6642\u5247\u8868\u793a\u6eff
2,\u52a0\u5165count\u8b8a\u6578,\u8868\u793a\u76ee\u524d\u4f47\u5217\u5167\u8cc7\u6599\u500b\u6578<\/p>\n\n\n\n

queue\u5faa\u5e8f\u8868\u793a\u6cd5
\u63d2\u5165\u8cc7\u6599
void insert(int x){
\u3000temp=(rear mod n)+1; \/\/1\u5c07rear\u9664n\u53d6\u9918\u6578+1
\u3000if(temp==front){printf(“queue is full”);} \/\/2,\u5224\u65b7\u662f\u5426\u5df1\u6eff,\u82e5\u6eff\u5247\u5be6\u969b\u8cc7\u6599\u53ea\u6709n-1\u500b,\u4e26\u4e14\u4e0d\u8981\u5c07rear\u52a01(\u56e0\u70ba\u53d6\u8cc7\u6599\u6642\u6703\u88ab\u8aa4\u5224\u70ba\u7a7a)
\u3000else{
\u3000\u3000rear=temp; \/\/\u82e5\u6c92\u6eff\u624d\u53ef\u5c07rear\u52a01
\u3000\u3000queue[rear]=x; \/\/3\u5c07\u8cc7\u6599\u5b58\u653e\u5230rear\u5b58\u6307\u4f4d\u7f6e
\u3000}
}
\u53d6\u51fa\u8cc7\u6599
void delete(){
\u3000if(rear==front){printr(“queue is empty”);} \/\/1\u5224\u65b7\u662f\u5426\u70ba\u7a7a
\u3000else{
\u3000\u3000front=(front mod n)+1; \/\/2\u5c07front\u9664n\u53d6\u9918\u6578+1
\u3000\u3000return(queue[front]); \/\/3\u53d6\u51fa\u8cc7\u6599
\u3000}
}<\/p>\n\n\n\n

\/\/\u74b0\u72c0queue\u7684\u52a0\u5165\u8cc7\u6599\uff0cp\u6307\u6700\u665a\u52a0\u5165\u7bc0\u9ede\uff0c\u56e0\u70ba\u662f\u74b0\u72c0\u6240\u4ee5p->link\u5247\u6307\u5230\u7b2c\u4e00\u500b\u52a0\u5165\u7684\u7bc0\u9ede
void add(int x){
\u3000struct node *temp;
\u3000temp=(struct node *)malloc(sizeof(struct node)); \/\/\u7522\u751f\u65b0\u7bc0\u9ede
\u3000temp->data=x;
\u3000if(p==nil){ temp->link=temp;} \/\/\u82e5queue\u70ba\u7a7a\uff0c\u5247\u6307\u5411\u81ea\u5df1
\u3000else{
\u3000\u3000temp->link=p->link; \/\/\u8b93\u65b0\u7bc0\u9edetemp\u6307\u5230\u7b2c\u4e00\u500b\u52a0\u5165\u7684\u7bc0\u9ede
\u3000\u3000p->link=temp; \/\/\u8b93\u539f\u672c\u6700\u665a\u52a0\u5165\u7684\u7bc0\u9ede\u6307\u5230\u65b0\u7bc0\u9ede
\u3000}
\u3000p=temp; \/\/\u8a18\u4f4f\u6700\u5f8c\u4e00\u500b\u7bc0\u9ede
}
\/\/\u74b0\u72c0queue\u522a\u9664\u6216\u53d6\u51fa\u8cc7\u6599
int delete(){
\u3000struct node *temp;int x;
\u3000if(p==nil){print(“the quese is empty”) ;}
\u3000else{
\u3000\u3000temp=p->link; \/\/\u628a\u6700\u524d\u9762\u7684\u7bc0\u9ede\u7d66temp\u7bc0\u9ede
\u3000\u3000x=temp->data; \/\/\u82e5\u8981\u56de\u50b3\u8cc7\u6599\u5247\u52a0
\u3000\u3000if(temp==p){p=nil;} \/\/\u82e5\u53ea\u6709\u4e00\u500b\u7bc0\u9ede\uff0c\u7b49\u4e0b\u5c31\u6703\u6d88\u5931
\u3000\u3000else{
\u3000\u3000\u3000p->link=temp->link; \/\/\u5c07\u6700\u524d\u9762\u7bc0\u9ede\u7684\u4e0b\u500b\u7bc0\u9ede\u4f4d\u7f6e\u7d66\u6700\u5f8c\u7bc0\u9ede
\u3000\u3000\u3000free(temp);
\u3000\u3000\u3000return(x); \/\/\u82e5\u8981\u56de\u50b3\u8cc7\u6599\u5247\u52a0
\u3000\u3000}
\u3000}
}<\/p>\n","protected":false},"excerpt":{"rendered":"

stack:LIFO(last in first out,\u5f8c …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[15],"tags":[],"class_list":["post-560","post","type-post","status-publish","format-standard","hentry","category-algorithm"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/560","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=560"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/560\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}