各位大佬过来帮帮忙吧
by DWDWDWDW @ 2020-08-27 16:27:23
帮你改完了
```
#include <iostream>
using namespace std;
int n,head=0,tail=1,startx,starty,endx,endy,book[1001][1001];
int xx[5]={1,0,-1,0};
int yy[5]={0,-1,0,1};
char k;
int mp[1001][1001];
struct note{
int x,y,step;
}que[5000001];
int main(){
//ios::sync_with_stdio(false);
//cin.tie(0);
cin>>n;
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
cin>>k;
if(k=='1') mp[i][j]=1;
}
}
cin>>startx>>starty>>endx>>endy;
que[1].x=startx;
que[1].y=starty;
mp[startx][starty]=1;
while(head<tail){
head++;
for(int i=0;i<4;i++){
int tx=que[head].x+xx[i];
int ty=que[head].y+yy[i];
if(tx>0 && tx<=n && ty>0 && ty<=n && !mp[tx][ty]){
tail++;
mp[tx][ty]=1;
que[tail].x=tx;
que[tail].y=ty;
que[tail].step=que[head].step+1;
if(tx==endx && ty==endy){cout<<que[tail].step;return 0;}
}
}
}
cout<<que[tail-1].step;
return 0;
}
```
by 沉鸣cmh @ 2020-09-23 20:37:37