哪里错了？ 第一个发布正确改法的用户必关注！！！

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string a;
    cin>>a;
    for(int i=1;i<=a.size();i++)
    {
        if(a[i]=='0')
        {
            cout<<".....";
        }
        else if(a[i]=='1')
        {
            cout<<"****.";
        }
        else if(a[i]=='2')
        {
            cout<<".....";
        }
        else
        {
            cout<<".....";
        }
    }
    cout<<endl;
    for(int i=1;i<=a.size();i++)
    {
        if(a[i]=='0')
        {
            cout<<".***.";
        }
        else if(a[i]=='1')
        {
            cout<<"****.";
        }
        else if(a[i]=='2')
        {
            cout<<"****.";
        }
        else
        {
            cout<<"****.";
        }
    }
    cout<<endl;
    for(int i=1;i<=a.size();i++)
    {
        if(a[i]=='0')
        {
            cout<<".***.";
        }
        else if(a[i]=='1')
        {
            cout<<"****.";
        }
        else if(a[i]=='2')
        {
            cout<<".....";
        }
        else
        {
            cout<<".....";
        }
    }
    cout<<endl;
    for(int i=1;i<=a.size();i++)
    {
        if(a[i]=='0')
        {
            cout<<".***.";
        }
        else if(a[i]=='1')
        {
            cout<<"****.";
        }
        else if(a[i]=='2')
        {
            cout<<"****.";
        }
        else
        {
            cout<<"****.";
        }
    }
    cout<<endl;
    for(int i=1;i<=a.size();i++)
    {
        if(a[i]=='0')
        {
            cout<<".....";
        }
        else if(a[i]=='1')
        {
            cout<<"****.";
        }
        else if(a[i]=='2')
        {
            cout<<".....";
        }
        else
        {
            cout<<".....";
        }
    }
}