打了好久代码，但所有数它都输出

XXX
X.X
XXX
..X
XXX

WA $\times$ 4 $+$ RE $\times$ 1

#include<iostream>
#include<string>
using namespace std;
int main() {
	int n,x=0;
	string str;
	char a[6][400];
	cin>>n>>str;
	for(int i=1;i<=n;i++) {
		int k=4*i-3;
		switch(str[i-1]) {
			case'0':a[1][k]=a[1][k+1]=a[1][k+2]=a[2][k]=a[2][k+2]=a[3][k]=a[3][k+2]=a[4][k]=a[4][k+2]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k+1]=a[3][k+1]=a[4][k+1]='.';
			case'1':a[1][k+2]=a[2][k+2]=a[5][k+2]=a[3][k+2]=a[4][k+2]='X';
					a[1][k]=a[2][k]=a[2][k+1]=a[3][k]=a[3][k+1]=a[4][k]=a[4][k+1]=a[5][k]=a[5][k+1]=a[1][k+1]='.';
			case'2':a[1][k+1]=a[1][k+2]=a[1][k]=a[2][k+2]=a[3][k]=a[3][k+2]=a[3][k+1]=a[4][k]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k]=a[2][k+1]=a[4][k+1]=a[4][k+2]='.';
			case'3':a[1][k+1]=a[1][k+2]=a[1][k]=a[2][k+2]=a[3][k]=a[3][k+2]=a[3][k+1]=a[4][k+2]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k]=a[2][k+1]=a[4][k+1]=a[4][k]='.';
			case'4':a[1][k+2]=a[1][k]=a[2][k+2]=a[2][k]=a[3][k+2]=a[3][k+1]=a[3][k]=a[4][k+2]=a[5][k+2]='X';
					a[1][k+1]=a[4][k]=a[2][k+1]=a[4][k+1]=a[5][k]=a[5][k+1]='.';
			case'5':a[1][k+1]=a[1][k+2]=a[1][k]=a[2][k]=a[3][k]=a[3][k+2]=a[3][k+1]=a[4][k+2]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k+2]=a[2][k+1]=a[4][k+1]=a[4][k]='.';
			case'6':a[1][k+1]=a[1][k+2]=a[1][k]=a[2][k]=a[4][k]=a[3][k]=a[3][k+2]=a[3][k+1]=a[4][k+2]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k+2]=a[2][k+1]=a[4][k+1]='.';
			case'7':a[1][k]=a[1][k+2]=a[2][k+2]=a[5][k+2]=a[3][k+2]=a[1][k+1]=a[4][k+2]='X';
					a[2][k]=a[2][k+1]=a[3][k]=a[3][k+1]=a[4][k]=a[4][k+1]=a[5][k]=a[5][k+1]='.';
			case'8':a[1][k+1]=a[2][k+2]=a[1][k+2]=a[1][k]=a[2][k]=a[4][k]=a[3][k]=a[3][k+2]=a[3][k+1]=a[4][k+2]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k+1]=a[4][k+1]='.';
			case'9':a[1][k+1]=a[2][k+2]=a[1][k+2]=a[1][k]=a[2][k]=a[3][k]=a[3][k+2]=a[3][k+1]=a[4][k+2]=a[5][k]=a[5][k+1]=a[5][k+2]='X';
					a[2][k+1]=a[4][k]=a[4][k+1]='.';
		}
		a[1][k+3]=a[2][k+3]=a[3][k+3]=a[4][k+3]=a[5][k+3]='.';
	}
	for(int i=1;i<=5;i++) {for(int j=1;j<4*n;j++) cout<<a[i][j]; cout<<endl;}
	return 0;
}

是 $switch$ 语句错了吗？？ 求挑错！！

有点乱，大佬们忍一下。。

最后一个RE我也不知道怎么回事。。