我在使用C++将12转换成汉明代码时遇到了问题

#include <iostream>
#include <vector>

// Function to convert decimal to binary
std::vector<int> decimalToBinary(int decimal) {
    std::vector<int> binary;
    while (decimal > 0) {
        binary.insert(binary.begin(), decimal % 2);
        decimal /= 2;
    }
    return binary;
}

// Function to calculate the number of parity bits required
int calculateParityBits(int dataLength) {
    int r = 1;
    while (dataLength + r + 1 > pow(2, r)) {
        r++;
    }
    return r;
}

// Function to add parity bits to the data
std::vector<int> addParityBits(const std::vector<int>& data) {
    int dataLength = data.size();
    int parityBitCount = calculateParityBits(dataLength);

    std::vector<int> hammingCode(dataLength + parityBitCount, 0);
    int dataIndex = 0;
    int parityIndex = 0;

    for (int i = 0; i < dataLength + parityBitCount; i++) {
        if (pow(2, parityIndex) - 1 == i) {
            parityIndex++;
        } else {
            hammingCode[i] = data[dataIndex];
            dataIndex++;
        }
    }

    for (int i = 0; i < parityBitCount; i++) {
        int parityBitIndex = pow(2, i) - 1;
        int parityBitValue = 0;
        for (int j = parityBitIndex; j < dataLength + parityBitCount; j = j + (2 * (parityBitIndex + 1))) {
            for (int k = j; k < j + parityBitIndex + 1 && k < dataLength + parityBitCount; k++) {
                parityBitValue ^= hammingCode[k];
            }
        }
        hammingCode[parityBitIndex] = parityBitValue;
    }

    return hammingCode;
}

// Function to convert binary to decimal
int binaryToDecimal(const std::vector<int>& binary) {
    int decimal = 0;
    int power = 1;
    for (int i = binary.size() - 1; i >= 0; i--) {
        decimal += binary[i] * power;
        power *= 2;
    }
    return decimal;
}

int main() {
    int decimal = 12;
    std::vector<int> binary = decimalToBinary(decimal);
    std::vector<int> hammingCode = addParityBits(binary);
    int hammingDecimal = binaryToDecimal(hammingCode);

    std::cout << "Decimal: " << decimal << std::endl;
    std::cout << "Binary: ";
    for (int i = 0; i < binary.size(); i++) {
        std::cout << binary[i];
    }
    std::cout << std::endl;
    std::cout << "Hamming Code: ";
    for (int i = 0; i < hammingCode.size(); i++) {
        std::cout << hammingCode[i];
    }
    std::cout << std::endl;
    std::cout << "Hamming Decimal: " << hammingDecimal << std::endl;

    return 0;
}