我对dijkstra打印路径有点问题，它正在处理小图形大小，如10-20等。在100上有问题，因为打印循环进入无限，当我尝试重复方法，VS显示我的exepction throw，堆栈溢出（同样的问题，比如^）。你知道怎么修这个人吗？有我的代码。
#include <stdio.h>
#include <iostream>
#include <limits.h>
#include <conio.h>
using namespace std;
struct graphNode {
int weight;
int v;
graphNode *next;
};
class Graph {
public:
graphNode *head, *tail;
int size, vIndex;
int currentWeight;
char type;
void addNode(int v_temp, int v_weight) {
graphNode *temp = new graphNode;
temp->next = nullptr;
if (head == nullptr) {
temp->v = v_temp;
temp->weight = v_weight;
head = temp;
}
else {
tail->next = temp;
temp->v = v_temp;
temp->weight = v_weight;
}
size++;
tail = temp;
}
// GET SET METHODS
char returnType() {
return type;
}
int returnCurrentWeight() {
return currentWeight;
}
void setCurrentWeight(int weight) {
currentWeight = weight;
}
void setVIndex(int temp) {
vIndex = temp;
}
void setType(char type_temp) {
type = type_temp;
}
// Constructor
Graph() {
head = nullptr;
tail = nullptr;
vIndex = 0;
size = 0;
currentWeight = 0;
}
};
struct heapNode {
int v;
int distance;
};
class Heap {
private:
Graph *graphArray;
heapNode **heapArray;
heapNode *root;
int vNumber, size;
int *position, *parent;
public:
heapNode *addEdge(int temp_v, int temp_distance) {
heapNode *temp = new heapNode;
temp->v = temp_v;
temp->distance = temp_distance;
return temp;
}
graphNode *returnVertexHead(int i) {
return graphArray[i].head;
}
char returnType(int i) {
return graphArray[i].returnType();
}
int *returnParent() {
return parent;
}
int returnWeight(int i) {
return graphArray[i].returnCurrentWeight();
}
void setWeight(int i, int weight) {
graphArray[i].setCurrentWeight(weight);
}
bool isInHeap(int temp_v) {
if (position[temp_v] < vNumber) return true;
return false;
}
bool isEmpty(int vNumber) {
if (vNumber == 0) return true;
return false;
}
void decrestDistans(int temp_v, int temp_distance) {
int index = position[temp_v];
heapNode *temp;
heapArray[index]->distance = temp_distance;
while (index && (heapArray[index]->distance < heapArray[(index - 1) / 2]->distance)) {
position[heapArray[index]->v] = (index - 1) / 2;
position[heapArray[(index - 1) / 2]->v] = index;
temp = heapArray[index];
heapArray[index] = heapArray[(index - 1) / 2];
heapArray[(index - 1) / 2] = temp;
index = (index - 1) / 2;
}
}
heapNode *removeMin() {
if (vNumber == 0) return nullptr;
root = heapArray[0];
heapArray[0] = heapArray[vNumber - 1];
position[root->v] = vNumber - 1;
position[heapArray[vNumber - 1]->v] = 0;
--vNumber;
repairHeapDown(0);
return root;
}
void repairHeapDown(int index) {
heapNode *temp;
int parentIndex = index;
int left = index * 2 + 1;
int right = index * 2 + 2;
if (left <= vNumber && heapArray[parentIndex]->distance > heapArray[left]->distance) parentIndex = left;
if (right <= vNumber && heapArray[parentIndex]->distance > heapArray[right]->distance) parentIndex = right;
if (index != parentIndex) {
position[heapArray[parentIndex]->v] = index;
position[heapArray[index]->v] = parentIndex;
temp = heapArray[index];
heapArray[index] = heapArray[parentIndex];
heapArray[parentIndex] = temp;
repairHeapDown(index);
}
}
int dijkstra(int start, int target) {
int *distance = new int[vNumber];
int i, v, weight;
graphNode *current_graph;
heapNode *current_heap;
for (int i = 0; i < vNumber; i++)
{
distance[i] = INT_MAX;
heapArray[i] = addEdge(i, distance[i]);
position[i] = i;
parent[i] = 0;
}
parent[start] = -1;
heapArray[start] = addEdge(start, distance[start]);
position[start] = start;
distance[start] = 0;
decrestDistans(start, distance[start]);
while (!isEmpty(vNumber)) {
current_heap = removeMin();
i = current_heap->v;
if (i == target) {
int temp = 2 * distance[target];
parent[v] = i;
delete[] position;
delete[] distance;
delete[] heapArray;
return temp;
}
current_graph = returnVertexHead(i);
while (current_graph != nullptr) {
v = current_graph->v;
weight = current_graph->weight + returnWeight(i) + distance[i];
if (weight < distance[v]) {
distance[v] = weight;
decrestDistans(v, distance[v]);
parent[v] = i;
}
current_graph = current_graph->next;
}
}
return 0;
}
Heap(Graph *table, int temp_vNumber) {
vNumber = temp_vNumber;
size = temp_vNumber;
root = nullptr;
heapArray = new heapNode*[size];
position = new int[size];
parent = new int[size];
graphArray = table;
}
~Heap() {
delete[] parent;
}
};
void printPath(int *parent, int start, int target)
{
int current = target;
while (current != start) {
cout << current << " ";
current = parent[current];
}
cout << current << " ";
}
int main() {
int n, time_knight, patch_number, temp_v, temp_weight, i,
home_index, gral_index, ni_index, ni_weight, krzak_index;
char type;
gral_index = home_index = ni_index = krzak_index = 0;
i = 0;
cin >> n >> time_knight;
Graph *table = new Graph[n];
while (1) {
cin >> type;
table[i].setType(type);
if (type == '5') gral_index = i;
if (type == '4') home_index = i;
if (type == '3') ni_index = i;
if (type == '2') table[i].setCurrentWeight(time_knight);
if (type == '1') krzak_index = i;
cin >> patch_number;
for (int j = 0; j < patch_number; j++)
{
cin >> temp_v >> temp_weight;
table[i].setVIndex(i);
table[i].addNode(temp_v, temp_weight);
}
i++;
if (i == n) break;
}
Heap *object = new Heap(table, n);
Heap *object2 = new Heap(table, n);
ni_weight = object->dijkstra(ni_index, krzak_index);
table[ni_index].setCurrentWeight(ni_weight);
cout << endl << endl << endl;
printPath(object->returnParent(), ni_index, krzak_index);
cout << endl << endl << endl;
object2->dijkstra(home_index, gral_index);
printPath(object2->returnParent(), home_index, gral_index);
_getch();
return 0;
}