为什么一直是编译错误？

#include<iostream>
#include<cstring>
#include<string>
using namespace std;
int x,y;
string s;
char a;
int main(){
    cin>>s;
    cout<<s.size()<<" ";
    if(s[0]=='0')x++;
    if(s[0]=='1')y++;
    for(int i=1;i<s.size();i++){
        if(s[i]==s[i-1]&&s[i]=='0')x++;
        if(s[i]==s[i-1]&&s[i]=='1')y++;
        if(s[i]!=s[i-1]&&s[i]=='1')cout<<x<<" ",y++,x=0;
        if(s[i]!=s[i-1]&&s[i]=='0')cout<<y<<" ",x++,y=0;
    }
    a=s[s.size()-1];
    for(int i=1;i<s.size();i++){
        cin>>s;
        if(s[0]==a&&s[0]=='0')x++;
        if(s[0]==a&&s[0]=='1')y++;
        if(s[0]!=a&&s[0]=='1')cout<<x<<" ",y++,x=0;
        if(s[0]!=a&&s[0]=='0')cout<<y<<" ",x++,y=0;
        for(int j=1;j<s.size();j++){
            if(s[j]==s[j-1]&&s[j]=='0')x++;
            if(s[j]==s[j-1]&&s[j]=='1')y++;
            if(s[j]!=s[j-1]&&s[j]=='1')cout<<x<<" ",y++,x=0;
            if(s[j]!=s[j-1]&&s[j]=='0')cout<<y<<" ",x++,y=0;
        }
        a=s[s.size()-1];
        if(i==s.size()-1&&s[s.size()-1]=='0')cout<<x<<" ",x++,y=0;
        if(i==s.size()-1&&s[s.size()-1]=='1')cout<<y<<" ",y++,x=0;
    }
}