Description
int maze[5][5] = { 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, };
Input
Output
Sample Input
0 1 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0
Sample Output
(0, 0) (1, 0) (2, 0) (2, 1) (2, 2) (2, 3) (2, 4) (3, 4) (4, 4)
参考代码:
#include<iostream> using namespace std; int map[5][5]; int vis[5][5]; struct node{ int x; int y; int pre; }edge[100]; int front=0,rear=1;//队头,队尾 int dir[4][2]={{0,-1},{1,0},{0,1},{-1,0}}; void f(int i)//倒向追踪法 { if(edge[i].pre!=-1) { f(edge[i].pre); cout<<"("<<edge[i].x<<", "<<edge[i].y<<")"<<endl; } } void BFS(int x,int y) { edge[front].x=x; edge[front].y=y; edge[front].pre=-1; while(front<rear)//队列为空时终止 { int u; for(u=0;u<4;u++) { int x=edge[front].x+dir[u][0]; int y=edge[front].y+dir[u][1]; if(x<0||x>=5||y<0||y>=5||vis[x][y]==1||map[x][y]==1) continue; else { vis[x][y]=1; map[x][y]=1; edge[rear].x=x;//入队 edge[rear].y=y; edge[rear].pre=front; rear++; } if(x==4&&y==4) f(front); } front++;//出队 } } int main() { int i,j; for(i=0;i<5;i++) { for(j=0;j<5;j++) { cin>>map[i][j]; } } memset(vis,0,sizeof(vis)); cout<<"("<<"0, 0)"<<endl; BFS(0,0); cout<<"(4, 4)"<<endl; return 0; }