求助

#include<bits/stdc++.h>
using namespace std;

int n,m,p,i,j,d,k,x,y,l=0;
char a[1001][1001];

void dp(){
	l=0;
	while(1){
		if(d==0){
			if(y+1>=1 and y+1<=m and a[x][y+1]!='x'){
				d=(d+1)%4;
				if(a[x][y]!='y') l++;
				a[x][y]='y';
				y++;
			}
			else d=(d+1)%4;
		}
		if(d==1){
			if(x+1>=1 and x+1<=n and a[x+1][y]!='x'){
				d=(d+1)%4;
				if(a[x][y]!='y') l++;
				a[x][y]='y';
				x++;
			}
			else d=(d+1)%4;
		}
		if(d==2){
			if(y-1>=1 and y-1<=m and a[x][y-1]!='x'){
				d=(d+1)%4;
				if(a[x][y]!='y') l++;
				a[x][y]='y';
				y--;
			}
			else d=(d+1)%4;
		}
		if(d==3){
			if(x-1>=1 and x-1<=n and a[x-1][y]!='x'){
				d=(d+1)%4;
				if(a[x][y]!='y') l++;
				a[x][y]='y';
				x--;
			}
			else d=(d+1)%4;
		}
		k--;
		if(k==0) return ;
//		cout<<"x:"<<x<<"  y:"<<y<<" k:"<<k<<"\n";
	}
}

int main(){
	freopen("1.in","r",stdin);
	freopen("1.out","w",stdout);
	int T;
	cin>>T;
	for(i=1;i<=T;i++){
		cin>>n>>m>>k;
		cin>>x>>y>>d;
		for(j=1;j<=n;j++){
			for(p=1;p<=m;p++){
				cin>>a[j][p];
			}
		}
		dp();
		cout<<l<<"\n";
	}
	return 0;
}