Repository: TheAlgorithms/C-Plus-Plus
File: greedy_algorithms/binary_addition.cpp (C++)

Code before:
            carry = sum / 2;  // Determine the carry for the next bit
            result.push_back((sum % 2) +
                             '0');  // Append the sum's current bit to result
        }
        if (carry) {
            result.push_back('1');
        }
        std::reverse(result.begin(), result.end());
        return result;
    }

 private:
    /**
     * @brief Validates whether a string contains only binary characters (0 or 1).
     * @param str The string to validate.
     * @return true if the string is binary, false otherwise.
     */
    bool isValidBinaryString(const std::string& str) const {
        return std::all_of(str.begin(), str.end(),
                           [](char c) { return c == '0' || c == '1'; });
    }
};
}  // namespace greedy_algorithms

/**
 * @brief run self test implementation.
 */
void tests() {
    greedy_algorithms::BinaryAddition binaryAddition;

    // Valid binary string tests
    assert(binaryAddition.addBinary("1010", "1101") == "10111");
    assert(binaryAddition.addBinary("1111", "1111") == "11110");
    assert(binaryAddition.addBinary("101", "11") == "1000");
    assert(binaryAddition.addBinary("0", "0") == "0");
    assert(binaryAddition.addBinary("1111", "1111") == "11110");
    assert(binaryAddition.addBinary("0", "10101") == "10101");
    assert(binaryAddition.addBinary("10101", "0") == "10101");
    assert(binaryAddition.addBinary("101010101010101010101010101010",
                                    "110110110110110110110110110110") ==
           "1100001100001100001100001100000");
    assert(binaryAddition.addBinary("1", "11111111") == "100000000");
    assert(binaryAddition.addBinary("10101010", "01010101") == "11111111");

    // Invalid binary string tests (should return empty string)
    assert(binaryAddition.addBinary("10102", "1101") == "");
    assert(binaryAddition.addBinary("ABC", "1101") == "");
    assert(binaryAddition.addBinary("1010", "1102") == "");
    assert(binaryAddition.addBinary("111", "1x1") == "");
    assert(binaryAddition.addBinary("1x1", "111") == "");
    assert(binaryAddition.addBinary("1234", "1101") == "");

Review comment (suggestion):
```suggestion
 * @brief run self test implementation.
 * @returns void
```

Code after:
            carry = sum / 2;  // Determine the carry for the next bit
            result.push_back((sum % 2) +
                             '0');  // Append the sum's current bit to result
        }
        if (carry) {
            result.push_back('1');
        }
        std::reverse(result.begin(), result.end());
        return result;
    }

 private:
    /**
     * @brief Validates whether a string contains only binary characters (0 or 1).
     * @param str The string to validate.
     * @return true if the string is binary, false otherwise.
     */
    bool isValidBinaryString(const std::string& str) const {
        return std::all_of(str.begin(), str.end(),
                           [](char c) { return c == '0' || c == '1'; });
    }
};
}  // namespace greedy_algorithms

/**
 * @brief run self test implementation.
 * @returns void
 */
static void tests() {
    greedy_algorithms::BinaryAddition binaryAddition;

    // Valid binary string tests
    assert(binaryAddition.addBinary("1010", "1101") == "10111");
    assert(binaryAddition.addBinary("1111", "1111") == "11110");
    assert(binaryAddition.addBinary("101", "11") == "1000");
    assert(binaryAddition.addBinary("0", "0") == "0");
    assert(binaryAddition.addBinary("1111", "1111") == "11110");
    assert(binaryAddition.addBinary("0", "10101") == "10101");
    assert(binaryAddition.addBinary("10101", "0") == "10101");
    assert(binaryAddition.addBinary("101010101010101010101010101010",
                                    "110110110110110110110110110110") ==
           "1100001100001100001100001100000");
    assert(binaryAddition.addBinary("1", "11111111") == "100000000");
    assert(binaryAddition.addBinary("10101010", "01010101") == "11111111");

    // Invalid binary string tests (should return empty string)
    assert(binaryAddition.addBinary("10102", "1101") == "");
    assert(binaryAddition.addBinary("ABC", "1101") == "");
    assert(binaryAddition.addBinary("1010", "1102") == "");
    assert(binaryAddition.addBinary("111", "1x1") == "");
    assert(binaryAddition.addBinary("1x1", "111") == "");