Algorithm flowchart

Stack

queue

Code

#include<iostream>
#include<stack>
#include<queue>
using namespace std;
class Node
{
public:
	Node(int a=0,int b=0,int c=0):x(a),y(b),di(c){}
	int x;
	int y;
	int di;
};
int map[15][15] = { {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},   //Sample maze, starting point (1,1), ending point (13,13)
			{1,0,1,1,1,1,1,1,1,1,1,1,1,1,1},
			{1,0,0,1,1,1,1,1,0,0,0,0,1,1,1},
			{1,1,0,1,1,1,1,1,0,1,1,0,1,1,1},
			{1,1,0,1,1,1,1,1,1,1,1,0,1,1,1},
			{1,1,0,0,0,0,0,0,0,0,0,0,1,1,1},
			{1,1,1,1,1,0,1,1,1,1,1,0,1,1,1},
			{1,1,1,1,1,0,0,1,1,1,0,0,1,1,1},
			{1,1,1,1,1,1,0,0,1,1,0,1,1,1,1},
			{1,1,1,1,1,1,1,0,1,1,0,1,1,1,1},
			{1,1,1,1,0,0,0,0,1,1,0,1,1,1,1},
			{1,1,1,1,1,1,1,0,1,1,0,1,1,1,1},
			{1,1,1,1,0,1,1,0,1,1,1,1,1,1,1},
			{1,1,1,1,0,0,0,0,0,0,0,0,0,0,1},
			{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}};
int passed[15][15] = { 0 };      //Judgement matrix
bool PassC(int x, int y)
{
	if (!map[x][y] && !passed[x][y])
		return true;
	else
		return false;
}
Node NextNode(Node temp)
{   
	switch (temp.di)
	{
	case 1:
		temp.y++;
		break;
	case 2:
		temp.x++;
		break;
	case 3:
		temp.y--;
		break;
	case 4:
		temp.x--;
		break;
	default:
		break;
	}
	temp.di = 1;
	return temp;
}
bool MazePathStack(stack<Node>& temp)   //Stack
{
	Node present(1, 1, 1);//
	while (true)
	{
		if (PassC(present.x, present.y))
		{
			temp.push(present);
			passed[present.x][present.y] = 1;
			if (present.x == 13 && present.y == 13)
				return true;
			present=NextNode(present);
		}
		else
		{
			while (!temp.empty())
			{
				Node *t = &temp.top();
	    		if (t->di != 4)
				{
					t->di++;
					present = NextNode(*t);
					break;
				}
				else
					temp.pop();
			}
			if (temp.empty())
				return false;
		}
	}
}
bool MazePathQueue(queue<Node>&temp)    //queue
{  
	
	Node present(1, 1, 1);//
	while (true)
	{
		if (PassC(present.x, present.y))
		{
			temp.push(present);
			passed[present.x][present.y] = 1;
			if (present.x == 13 && present.y == 13)
				return true;
			present = NextNode(present);
		}
		else
		{
			while (!temp.empty())
			{
				Node *t = &temp.back();
				if (t->di != 4)
				{
					t->di++;
					present = NextNode(*t);
					break;
				}
				else
				{
					queue<Node> newq;
					while (!(temp.front().x == t->x && temp.front().y == t->y))
					{
						newq.push(temp.front());
						temp.pop();
					}
					temp.pop();
					temp = newq;
				}
			}
			if (temp.empty())
				return false;
		}
	}
}
int main()
{
	stack<Node>path;
	queue<Node>Path;
	Node point;
	int choice;
	cout << "Stack realizes input 1, queue realizes input 2";
	cin >> choice;
	if (choice == 1)
	{
		if (MazePathStack(path))   //Stack
			while (!path.empty())
			{
				point = path.top();
				cout << ++point.x << ":" << ++point.y << ",";
				path.pop();
			}
		else
			cout << "The path does not exist!";
	}
	else
	{
		if (MazePathQueue(Path))  //queue
		{
			while (!Path.empty())
			{
				point = Path.front();
				cout << ++point.x << ":" << ++point.y << ",";
				Path.pop();
			}
		}
		else
			cout << "The path does not exist!";
	}
	return 0;
}