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Urban_subway_navigation_system
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Liwenfei 1 year ago
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2 changed files with 351 additions and 421 deletions
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#include <iostream>
#include <vector>
#include <queue>
#include <string>
#include <map>
using namespace std;
const int N = 240; //地铁站点数目
const int INF = 0x3f3f3f3f; //表示正无穷
//地铁线路的颜色
string line_color[22] = {"", "1号线", "2号线", "4号线",
"5号线", "6号线", "7号线",
"8号线", "9号线", "10号线",
"13号线", "14号线东",
"14号线西", "15号线",
"16号线", "八通线", "昌平线",
"亦庄线", "房山线", "机场线",
"西郊线", "S2线"};
//地铁站点信息
struct Station {
string name; //站点名称
int line; //所在地铁线路
int transfer; //是否为换乘站（0不是，否则表示该站可以换乘）
bool operator<(const Station& other) const { //定义小于号，方便使用stl的heap/priority_queue
return line < other.line;
}
} station_list[N + 1];
//地铁站点间的距离
int dist[N + 1][N + 1];
//向地铁站点列表中添加站点
void add_station(int id, string name, int line, int transfer) {
station_list[id] = {name, line, transfer};
}
//初始化北京地铁的站点信息和站点间距离
void init_subway_map() {
//初始化站点信息
add_station(1, "苹果园", 1, 1);
add_station(2, "古城", 1, 0);
add_station(3, "八角游乐园", 1, 0);
add_station(4, "八宝山", 1, 0);
add_station(5, "玉泉路", 1, 0);
add_station(6, "五棵松", 1, 1);
add_station(7, "万寿路", 1, 0);
add_station(8, "公主坟", 1, 1);
add_station(9, "军事博物馆", 1, 0);
add_station(10, "木樨地", 1, 0);
add_station(11, "南礼士路", 1, 0);
add_station(12, "复兴门", 1, 1);
add_station(13, "西单", 1, 1);
add_station(14, "天安门西", 1, 0);
add_station(15, "天安门东", 1, 0);
add_station(16, "王府井", 1, 1);
add_station(17, "东单", 1, 1);
add_station(18, "建国门", 1, 1);
add_station(19, "永安里", 1, 0);
add_station(20, "国贸", 1, 1);
add_station(21, "大望路", 1, 0);
add_station(22, "四惠", 1, 1);
add_station(23, "四惠东", 1, 0);
add_station(24, "西直门", 2, 1);
add_station(25, "车公庄", 2, 1);
add_station(26, "阜成门", 2, 0);
add_station(27, "复兴门", 2, 1);
add_station(28, "长椿街", 2, 0);
add_station(29, "宣武门", 2, 1);
add_station(30, "和平门", 2, 0);
add_station(31, "前门", 2, 0);
add_station(32, "崇文门", 2, 1);
add_station(33, "北京站", 2, 1);
add_station(34, "建国门", 2, 1);
add_station(35, "朝阳门", 2, 1);
add_station(36, "东四十条", 2, 0);
add_station(37, "东直门", 2, 1);
add_station(38, "雍和宫", 2, 1);
add_station(39, "安定门", 2, 0);
add_station(40, "鼓楼大街", 2, 1);
add_station(41, "积水潭", 2, 0);
add_station(42, "西直门", 4, 1);
add_station(43, "新街口", 4, 0);
add_station(44, "平安里", 4, 1);
add_station(45, "西四", 4, 0);
add_station(46, "灵境胡同", 4, 0);
add_station(47, "西单", 4, 1);
add_station(48, "宣武门", 4, 1);
add_station(49, "菜市口", 4, 1);
add_station(50, "陶然亭", 4, 0);
add_station(51, "北京南站", 4, 1);
add_station(52, "马家堡", 4, 0);
add_station(53, "角门西", 4, 0);
add_station(54, "公益西桥", 4, 0);
add_station(55, "新宫", 4, 0);
add_station(56, "西红门", 4, 0);
add_station(57, "高米店北", 4, 0);
add_station(58, "高米店南", 4, 0);
add_station(59, "枣园", 4, 0);
add_station(60, "清源路", 4, 0);
add_station(61, "黄村西大街", 4, 0);
add_station(62, "黄村火车站", 4, 0);
add_station(63, "义和庄", 4, 0);
add_station(64, "生物医药基地", 4, 0);
add_station(65, "天宫院", 4, 0);
add_station(66, "宋家庄", 5, 1);
add_station(67, "刘家窑", 5, 0);
add_station(68, "蒲黄榆", 5, 1);
add_station(69, "天坛东门", 5, 0);
add_station(70, "磁器口", 5, 1);
add_station(71, "崇文门", 5, 1);
add_station(72, "东单", 5, 1);
add_station(73, "灯市口", 5, 0);
add_station(74, "东四", 5, 0);
add_station(75, "张自忠路", 5, 0);
add_station(76, "北新桥", 5, 0);
add_station(77, "雍和宫", 5, 1);
add_station(78, "和平里北街", 5, 0);
add_station(79, "和平西桥", 5, 0);
add_station(80, "惠新西街南口", 5, 0);
add_station(81, "惠新西街北口", 5, 0);
add_station(82, "大屯路东", 5, 1);
add_station(83, "北苑路北", 5, 0);
add_station(84, "立水桥南", 5, 0);
add_station(85, "立水桥", 5, 1);
add_station(86, "天通苑南", 5, 0);
add_station(87, "天通苑", 5, 0);
add_station(88, "天通苑北", 5, 0);
add_station(89, "昌平西山口", 5, 0);
add_station(90, "十三陵景区", 5, 0);
add_station(91, "昌平", 5, 0);
add_station(92, "昌平东关", 5, 0);
add_station(93, "南邵", 8, 0);
add_station(94, "沙河高教园", 8, 0);
add_station(95, "沙河", 8, 0);
add_station(96, "巩华城", 8, 0);
add_station(97, "朱辛庄", 8, 0);
add_station(98, "生命科学园", 8, 0);
add_station(99, "西二旗", 13, 1);
add_station(100, "生命科学园", 13, 0);
add_station(101, "永泰庄", 13, 0);
add_station(102, "西北旺", 13, 0);
add_station(103, "马连洼", 13, 0);
add_station(104, "上地", 13, 1);
add_station(105, "五道口", 13, 1);
add_station(106, "知春路", 13, 1);
add_station(107, "知春里", 13, 0);
add_station(108, "海淀黄庄", 4, 1);
add_station(109, "人民大学", 4, 0);
add_station(110, "魏公村", 4, 0);
add_station(111, "国家图书馆", 4, 1);
add_station(112, "动物园", 4, 1);
add_station(113, "新街口", 4, 0);
add_station(114, "平安里", 6, 1);
add_station(115, "北海北", 6, 0);
add_station(116, "南锣鼓巷", 6, 1);
add_station(117, "东四", 6, 1);
add_station(118, "朝阳门", 6, 1);
add_station(119, "东大桥", 6, 0);
add_station(120, "呼家楼", 6, 1);
add_station(121, "金台路", 6, 1);
add_station(122, "十里堡", 6, 0);
add_station(123, "青年路", 6, 0);
add_station(124, "褡裢坡", 6, 0);
add_station(125, "黄渠", 6, 0);
add_station(126, "常营", 6, 0);
add_station(127, "草房", 6, 0);
add_station(128, "物资学院路", 6, 0);
add_station(129, "通州北关", 6, 0);
add_station(130, "北运河西", 6, 0);
add_station(131, "郝家府", 6, 0);
add_station(132, "东夏园", 6, 0);
add_station(133, "潞城", 6, 0);
add_station(134, "顺义", BC, 0);
add_station(135, "俸伯", BC, 0);
add_station(136, "机场北站", BC, 0);
add_station(137, "中关村", 10, 1);
add_station(138, "海淀大街", 10, 1);
add_station(139, "知春路", 10, 1);
add_station(140, "西土城", 10, 0);
add_station(141, "牡丹园", 10, 0);
add_station(142, "健德门", 10, 0);
add_station(143, "北土城", 10, 0);
add_station(144, "安贞门", 10, 1);
add_station(145, "惠新西街南口", 10, 0);
add_station(146, "芍药居", 10, 1);
add_station(147, "太阳宫", 10, 0);
add_station(148, "三元桥", 10, 1);
add_station(149, "亮马桥", 10, 0);
add_station(150, "农业展览馆", 10, 1);
add_station(151, "团结湖", 10, 0);
add_station(152, "呼家楼", 10, 1);
add_station(153, "金台夕照", 10, 0);
add_station(154, "国贸", 10, 1);
add_station(155, "双井", 10, 0);
add_station(156, "劲松", 10, 0);
add_station(157, "潘家园", 10, 0);
add_station(158, "十里河", 10, 1);
add_station(159, "分钟寺", 10, 0);
add_station(160, "成寿寺", 10, 0);
add_station(161, "宋家庄", 10, 1);
add_station(162, "石榴庄", 5, 0);
add_station(163, "大红门", 10, 0);
add_station(164, "角门东", 10, 0);
add_station(165, "角门西", 10, 0);
add_station(166, "草桥", 10, 0);
add_station(167, "纪家庙", FS, 0);
add_station(168, "首经贸", FS, 1);
add_station(169, "丰台站", FS, 0);
add_station(170, "泥洼", FS, 0);
add_station(171, "西局", FS, 1);
add_station(172, "六里桥", FS, 1);
add_station(173, "莲花桥", FS, 0);
add_station(174, "公主坟", FS, 1);
add_station(175, "西钓鱼台", FS, 0);
add_station(176, "慈寿寺", FS, 1);
add_station(177, "车道沟", FS, 0);
add_station(178, "长春桥", FS, 0);
add_station(179, "火器营", 9, 1);
add_station(180, "巴沟", 10, 0);
add_station(181, "苏州街", 10, 0);
add_station(182, "海淀五路居", 10, 0);
add_station(183, "知春路", 10, 1);
add_station(184, "知春里", 10, 0);
add_station(185, "西土城", 10, 0);
add_station(186, "牡丹园", 10, 0);
add_station(187, "健德门", 10, 0);
add_station(188, "北土城", 10, 0);
add_station(189, "安贞门", 10, 0);
//初始化站点间距离
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= N; j++) {
if (i == j) {
dist[i][j] = 0;
} else {
dist[i][j] = INF;
}
}
}
//1号线
dist[1][2] = dist[2][1] = 4;
dist[2][3] = dist[3][2] = 4;
//2号线
dist[4][5] = dist[5][4] = 4;
dist[5][6] = dist[6][5] = 4;
//4号线
dist[7][8] = dist[8][7] = 6;
dist[8][9] = dist[9][8] = 6;
//5号线
dist[10][11] = dist[11][10] = 4;
dist[11][12] = dist[12][11] = 4;
//6号线
dist[13][14] = dist[14][13] = 4;
dist[14][15] = dist[15][14] = 4;
//7号线
dist[16][17] = dist[17][16] = 5;
dist[17][18] = dist[18][17] = 5;
//8号线
dist[19][20] = dist[20][19] = 4;
dist[20][21] = dist[21][20] = 4;
//9号线
dist[22][23] = dist[23][22] = 5;
dist[23][24] = dist[24][23] = 5;
//10号线
dist[25][26] = dist[26][25] = 4;
dist[26][27] = dist[27][26] = 4;
//13号线
dist[28][29] = dist[29][28] = 6;
dist[29][30] = dist[30][29] = 6;
//14号线东
dist[31][32] = dist[32][31] = 5;
dist[32][33] = dist[33][32] = 5;
//14号线西
dist[34][35] = dist[35][34] = 6;
dist[35][36] = dist[36][35] = 6;
//15号线
dist[37][38] = dist[38][37] = 3;
dist[38][39] = dist[39][38] = 3;
//16号线
dist[40][41] = dist[41][40] = 3;
//八通线
dist[42][43] = dist[43][42] = 3;
dist[43][44] = dist[44][43] = 4;
//昌平线
dist[45][46] = dist[46][45] = 4;
dist[46][47] = dist[47][46] = 4;
//亦庄线
dist[48][49] = dist[49][48] = 3;
//房山线
dist[50][51] = dist[51][50] = 3;
dist[51][52] = dist[52][51] = 3;
//机场线
dist[53][54] = dist[54][53] = 13;
//西郊线（只有一个站点）
dist[55][55] = 10;
//S2线
dist[56][57] = dist[57][56] = 4;
dist[57][58] = dist[58][57] = 4;
}
//BFS搜索最短路径，返回路径长度
int bfs(int start, int end) {
queue<int> q;
vector<bool> visited(N + 1, false); //记录每个节点是否被访问过
vector<int> distance(N + 1); //记录每个节点距离起点的距离
q.push(start);
visited[start] = true;
while (!q.empty()) {
int cur = q.front();
q.pop();
for (int i = 1; i <= N; i++) {
if (dist[cur][i] != INF && !visited[i]) {
visited[i] = true;
distance[i] = distance[cur] + 1;
q.push(i);
}
}
}
return distance[end];
}
//输出从start到end的最短路径
void print_route(int start, int end) {
priority_queue<pair<int,string>, vector<pair<int,string>>, greater<pair<int,string>>> q; //小根堆，按照距离升序排列，如果距离相同，按照站点名称升序排列
map<int, bool> added; //记录已经添加到队列中的节点，防止重复添加
vector<pair<int,string>> route; //记录路径上的所有站点
q.push({0,station_list[start].name});
while (!q.empty()) {
auto cur = q.top();
q.pop();
if (cur.second == station_list[end].name) { //找到了终点，直接退出循环
break;
}
int cur_id = 0;
for (int i = 1; i <= N; i++) {
if (station_list[i].name == cur.second) {
cur_id = i;
break;
}
}
added[cur_id] = true;
for (int i = 1; i <= N; i++) {
if (dist[cur_id][i] != INF && !added[i]) { //如果两个站点之间有直达的地铁线路，并且该站点没有被添加过
q.push({cur.first + dist[cur_id][i], station_list[i].name}); //将该节点加入队列
added[i] = true;
route.push_back({i, station_list[i].name}); //记录该站点
}
}
}
cout << "从 " << station_list[start].name << " 到 " << station_list[end].name << " 的最短路线为：" << endl;
int pre_line = -1; //上一个站点所在的地铁线路
for (auto p : route) {
int cur_id = p.first;
int cur_line = station_list[cur_id].line;
if (pre_line != cur_line) { //如果到达了新的地铁线路，输出该线路名称和颜色
cout << endl << " 从" << line_color[cur_line] << "（";
switch (cur_line) {
case 1:
cout << "red）";
break;
case 2:
cout << "dark green）";
break;
case 4:
cout << "light blue）";
break;
case 5:
cout << "yellow）";
break;
case 6:
cout << "brown）";
break;
case 7:
cout << "gray）";
break;
case 8:
cout << "pink）";
break;
case 9:
cout << "purple）";
break;
case 10:
cout << "light green）";
break;
case 13:
cout << "orange）";
break;
case 14:
cout << "turquoise）";
break;
case 15:
cout << "olive green）";
break;
case 16:
cout << "maroon）";
break;
case 21:
cout << "blue）";
break;
default:
break;
}
cout << " 乘坐到 " << station_list[cur_id].name << " 站，步行 ";
pre_line = cur_line;
} else {
cout << " -> ";
}
cout << dist[p.first][route.back().first] << " 米";
}
cout << endl << "共 " << bfs(start, end) << " 站，需要步行 " << route.back().first - route.front().first << " 米" << endl;
}
int main() {
init_subway_map();
print_route(1, 240);
return 0;
}

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#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <string.h>
#include <iostream>
using namespace std;
#define ALLNameNum 99
#define INF 99999
typedef int dist[ALLNameNum];
typedef int path[ALLNameNum];
typedef struct
{
char name[100];
char intro[999];
int x, y;
}SITE;
typedef struct
{
SITE site[ALLNameNum];
int length[ALLNameNum][ALLNameNum];
}MAP;
MAP M;
int N = 0;
path p;
dist d;
void init()
{
int i, j;
strcpy(M.site[1].name, "苹果园");
strcpy(M.site[1].intro, "北京市石景山区，位于苹果园南路");
strcpy(M.site[2].name, "古城");
strcpy(M.site[2].intro, "位于北京市石景山区石景山路与古城小街交会东侧");
strcpy(M.site[3].name, "八角游乐园");
strcpy(M.site[3].intro, "石景山区八角立交桥东侧");
strcpy(M.site[4].name, "公主坟");
strcpy(M.site[4].intro, "北京市海淀区复兴路和西三环中路交会处下方");
strcpy(M.site[5].name, "复兴门");
strcpy(M.site[5].intro, "位于北京市西城区复兴门外大街、复兴门内大街、复兴门南大街、复兴门北大街交汇处");
strcpy(M.site[6].name, "天安门西");
strcpy(M.site[6].intro, "位于中国北京市西城区西长安街和南长街交会处，是北京地铁运营有限公司运营管理的车站，也是北京地铁1号线的中间站");
strcpy(M.site[7].name, "建国门");
strcpy(M.site[7].intro, "位于中国北京市东城区与朝阳区交界处建国门桥下方，是北京地铁运营有限公司运营的车站，也是北京地铁1号线、北京地铁2号线的换乘站");
strcpy(M.site[8].name, "永安门");
strcpy(M.site[8].intro, "位于中国北京市朝阳区建国门外大街与东大桥路交叉口的下方");
strcpy(M.site[9].name, "鼓楼大街");
strcpy(M.site[9].intro, "是北京地铁2号线与北京地铁8号线的换乘站,位于北京市西城区与东城区交界处,安定门西大街-德胜门东大街与旧鼓楼大街-旧鼓楼外大街交会处");
strcpy(M.site[10].name, "雍和宫");
strcpy(M.site[10].intro, "位于北京市东城区北二环安定门东大街与雍和宫大街、和平里西街交汇处");
strcpy(M.site[11].name, "朝阳门");
strcpy(M.site[11].intro, "位于北京市东城区与朝阳区交界处,朝阳门外大街-朝阳门内大街与朝阳门南大街-朝阳门北大街交汇处");
strcpy(M.site[12].name, "北京站");
strcpy(M.site[12].intro, "位于中国北京市东城区境内、北京站北广场下方");
strcpy(M.site[13].name, "崇文门");
strcpy(M.site[13].intro, "北京地铁2号线和北京地铁5号线在此交汇，位于北京市东城区前门东大街与崇文门内大街交汇口");
strcpy(M.site[14].name, "和平门");
strcpy(M.site[14].intro, "位于北京市西城区北新华街－南新华街与前门西大街－宣武门东大街交汇处");
strcpy(M.site[15].name, "宣武门");
strcpy(M.site[15].intro, "位于中国北京市西城区，是北京地铁2号线和北京地铁4号线的换乘站");
strcpy(M.site[16].name, "长椿街");
strcpy(M.site[16].intro, "长椿街站是北京地铁2号线的一个车站,位于北京市西城区宣武门西大街、长椿街交汇处");
strcpy(M.site[17].name, "西直门");
strcpy(M.site[17].intro, "位于北京市西城区西直门桥下方");
strcpy(M.site[18].name, "圆明园");
strcpy(M.site[18].intro, "位于北京市海淀区清华西路");
strcpy(M.site[19].name, "北京大学东门");
strcpy(M.site[19].intro, "位于中国北京市海淀区境内");
strcpy(M.site[20].name, "中关村");
strcpy(M.site[20].intro, "位于北京市海淀区中关村一桥南侧");
strcpy(M.site[21].name, "海淀黄庄");
strcpy(M.site[21].intro, "是北京地铁4号线和北京地铁10号线的换乘站");
strcpy(M.site[22].name, "人民大学");
strcpy(M.site[22].intro, "位于北京市海淀区四通桥");
strcpy(M.site[23].name, "国家图书馆");
strcpy(M.site[23].intro, "国家图书馆站位于国家图书馆的南侧地下");
strcpy(M.site[24].name, "动物园");
strcpy(M.site[24].intro, "位于北京市西直门外大街");
strcpy(M.site[25].name, "北京南站");
strcpy(M.site[25].intro, "位于中国北京市丰台区铁路北京南站下方");
strcpy(M.site[26].name, "西红门");
strcpy(M.site[26].intro, "位于中国北京市大兴区境内");
strcpy(M.site[27].name, "生物医药基地");
strcpy(M.site[27].intro, "是北京地铁4号线的一座车站,位于北京市大兴区新源大街与永大路交口南侧");
strcpy(M.site[28].name, "天坛东门");
strcpy(M.site[28].intro, "位于中国北京市东城区");
strcpy(M.site[29].name, "天通苑");
strcpy(M.site[29].intro, "是北京地铁5号线的一座车站，也是北京第一个通过民意增加的地铁车站，位于北京市昌平区立汤路与太平庄中二街交汇处北侧");
strcpy(M.site[30].name, "天通苑北");
strcpy(M.site[30].intro, "位于北京市昌平区天通苑北界太平庄北街以北400米处");
for (i = 1; i <= ALLNameNum; i++)
{
for (j = 1; j <= ALLNameNum; j++)
{
M.length[i][j] = INF;
}
}
for (i = 1; i <= ALLNameNum; i++)
M.length[i][i] = 0;
M.length[1][2] = M.length[2][1] = 30;
M.length[1][3] = M.length[3][1] = 30;
M.length[2][3] = M.length[3][2] = 90;
M.length[2][4] = M.length[4][2] = 70;
M.length[3][5] = M.length[5][3] = 50;
M.length[3][6] = M.length[6][3] = 50;
M.length[4][5] = M.length[5][4] = 50;
M.length[4][7] = M.length[7][4] = 100;
M.length[5][6] = M.length[6][5] = 30;
M.length[6][7] = M.length[7][6] = 110;
M.length[6][10] = M.length[10][6] = 20;
M.length[7][8] = M.length[8][7] = 30;
M.length[7][9] = M.length[9][7] = 30;
M.length[7][10] = M.length[10][7] = 30;
M.length[8][9] = M.length[9][8] = 30;
M.length[9][10] = M.length[10][9] = 60;
M.length[9][11] = M.length[11][9] = 40;
M.length[10][11] = M.length[11][10] = 40;
M.length[11][12] = M.length[12][11] = 100;
M.length[11][13] = M.length[13][11] = 50;
M.length[12][13] = M.length[13][12] = 60;
M.length[12][15] = M.length[15][12] = 30;
M.length[12][17] = M.length[17][12] = 170;
M.length[13][14] = M.length[14][13] = 70;
M.length[13][15] = M.length[15][13] = 30;
M.length[13][16] = M.length[16][13] = 50;
M.length[14][16] = M.length[16][14] = 50;
M.length[15][16] = M.length[16][15] = 20;
M.length[16][17] = M.length[17][16] = 30;
M.length[17][18] = M.length[18][17] = 60;
M.length[17][19] = M.length[19][17] = 30;
M.length[17][20] = M.length[20][17] = 170;
M.length[18][20] = M.length[20][18] = 70;
M.length[19][21] = M.length[21][19] = 30;
M.length[20][21] = M.length[21][20] = 50;
M.length[21][22] = M.length[22][21] = 50;
M.length[21][24] = M.length[24][21] = 20;
M.length[22][23] = M.length[23][22] = 30;
M.length[23][25] = M.length[25][23] = 60;
M.length[23][26] = M.length[26][23] = 30;
M.length[24][25] = M.length[25][24] = 170;
M.length[25][27] = M.length[27][25] = 70;
M.length[26][27] = M.length[27][26] = 30;
M.length[27][28] = M.length[28][27] = 50;
M.length[27][29] = M.length[29][27] = 50;
M.length[28][29] = M.length[29][28] = 20;
M.length[29][30] = M.length[30][29] = 30;
N = 30;
}
void queryAllSite()
{
int t;
printf("所有地点如下：\n");
for (t = 1; t <= N; t++)
{
printf("编号； %d\n 地点：%s\n 介绍：%s\n", t, M.site[t].name, M.site[t].intro);
}
printf("\n任意键返回");
getch();
}
void querySite()
{
int a;
printf("请问您要查询的地点编号是：");
scanf("%d", &a);
if (a > N)
printf("查询的地点不存在，查询失败！");
else
printf("编号：%d\n 地点：%s\n 介绍：%s\n", a, M.site[a].name, M.site[a].intro);
printf("\n按任意键返回！");
getch();
}
void dijkstraAllSite()
{
int v0;
printf("请输入查询的地点：");
scanf("%d", &v0);
bool flag[ALLNameNum];
//v表示上一个节点，k表示遍历节点
int i, k, j, v, min, x;
for (v = 1; v <= N; v++)
{
flag[v]=0;
d[v] = M.length[v0][v];
if (d[v] < INF && d[v] != 0)
p[v] = v0;
else
p[v] = -1;
}
flag[v0] = 1;
d[v0] = 0;//原点距离
for (i = 2; i <= N; i++)
{
min = INF;
for (k = 1; k <= N; ++k)
if (!flag[k] && d[k] < min)
{//没有被查询过并且距离小于最小值则更新
v = k;
min = d[k];
}
if (min == INF)
return;
flag[v] = 1;
for (k = 1; k <= N; ++k)
if (!flag[k] && (min + M.length[v][k] < d[k]))
{
d[k] = min + M.length[v][k];//到k的距离
p[k] = v;//k节点的上一个节点是v
}
}
}
void printAllSite()
{
int st[ALLNameNum], i, pre, top = -1;
for (i = 1; i <= N; i++)
{
printf("\n到达地点%2d的总距离为: %5d , 经过路径为:", i, d[i]);
st[++top] = i;
pre = p[i];
while (pre != -1)
{
st[++top] = pre;
pre = p[pre];
}
while (top > 0)
{
printf("%d", st[top--]);
if (top > 0)
printf("--->");
}
}
getch();
}
void dijkstraTwoSite()
{
int v0;
printf("请输入起始地点所对应的编号：");
scanf("%d", &v0);
bool flag[ALLNameNum];
int i, k, j, v, min, x;
for (v = 1; v <= N; v++)
{
flag[v] = 0;
d[v] = M.length[v0][v];
if (d[v] < INF && d[v] != 0)
p[v] = v0;
else
p[v] = -1;
}
flag[v0] = 1;
d[v0] = 0;
for (i = 2; i <= N; i++)
{
min = INF;
for (k = 1; k <= N; ++k)
if (!flag[k] && d[k] < min)
{
v = k;
min = d[k];
}
if (min == INF)
return;
flag[v] = 1;
for (k = 1; k <= N; ++k)
if (!flag[k] && (min + M.length[v][k] < d[k]))
{
d[k] = min + M.length[v][k];
p[k] = v;
}
}
}
void printTwoSite()
{
int y;
printf("\n请输入目的地点所对应的编号：");
scanf("%d", &y);
int st[ALLNameNum], i, pre, top = -1;
for (i = 1; i <= N; i++)
{
if (i == y)
printf("\n总距离是: %5d , 经过路径为:", d[i]);
st[++top] = i;
pre = p[i];
while (pre != -1)
{
st[++top] = pre;
pre = p[pre];
}
while (top > 0)
{
if (i == y)
{
printf("%d", st[top--]);
if (top > 0)
printf("--->");
}
else
top--;
}
}
getch();
}
main()
{
init();
int x;
while (1)
{
printf("**********************************************************************\n");
printf("* 欢迎使用北京地铁路线规划系统 *\n");
printf("**********************************************************************\n");
printf("\n 0、退出程序 ");
printf("\n 1、输出所有站点及其介绍");
printf("\n 2、查询某一地铁站点及其介绍");
printf("\n 3、查询某一站点到其他所有站点的最短路径");
printf("\n 4、查询某两个站点之间的最短路径 ");
printf("\n*******************************************************************");
printf("地点编号对应：\n");
printf(" 1.苹果园 2.古城 3.八角游乐园 4.公主坟 5.复兴门 6.天安门西 7.建国门 8.永安门 9.鼓楼大街 10.雍和宫\n");
printf("11.朝阳门 12.北京站 13.崇文门 14.和平门 15.宣武门 16.长椿街 17.西直门 18.圆明园 19.北京大学东门 20.中关村 21.海淀黄庄 22.人民大学 23.国家图书馆 24.动物园 25.北京南站 26.西红门 27.生物医药基地 28天坛东门 29.天通苑 30.天通苑北\n ");
printf("\n请输入选项：");
scanf("%d", &x);
if (x == 0)
break;
else
switch (x)
{
case 1:queryAllSite(); break;
case 2:querySite(); break;
case 3:dijkstraAllSite(); printAllSite(); break;
case 4:dijkstraAllSite(); printTwoSite(); break;
}
system("cls");
}
}
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