Please tell me why is it wrong?

#1 
#include <iostream>
#include <string>

int main() {
    int t = 0;
    std::string str1;
    std::string str2;
    std::string str3;
    std::cin >> t;
    while (t--) {
        std::cin >> str1;
        std::cin >> str2;
        for (size_t i = 0; i <= str1.std::string::length(); ++i) {
            if ((str1[i] == '0' && str2[i] == '1') ||
                (str1[i] == '1' && str2[i] == '0'))
                str3[i] = '1';
            else if (i == str1.std::string::length())
                ;
            else
                str3[i] = '0';
        }
        for (size_t i = 0; i < str1.std::string::length(); ++i)
            std::cout << str3[i];
    }
    return 0;
}
#2

Hello @moon your code is perfectly fine .
you have to just print the output for every test case in the new line.


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Happy Learning!!

1 Like
#3

Thanks for the help! :grinning:

#4

@moon you can mark this doubt as resolved.

#5

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