Please tell what is the problem in this code?

#1

I think the method is correct but not getting any output.

#2

Hey @sahilkhan2312000131

    #include<iostream>
    using namespace std;

    int main() {

       int t;
       cin>>t;
       while(t--){

        string a,b;
        cin>>a>>b;
        string c(a.length(),' ');//initializimg c with space of required length
        for(int i=0;i<a.length();i++){



            if(a[i]==b[i])
                c[i]='0';//= instead of ==
            else
                c[i]='1';//= instead of ==

        }

        cout<<c<<endl;


       }




        return 0;
    }
#3

If this resolves your query then please mark it as resolved :slight_smile:

#4

Why do we have to create c with a well defined size??
We can simply make a normal string.

#5

Because you are using c[i] to reference i th character which we can only do if it exist .

So either declare string like this or use + or push_back to append in string

1 Like
#6

thank u so much kartik

1 Like