如何将十六进制字符串转换为C++二进制文件

#include <iostream>
#include <fstream>
#include <string>

// 将十六进制字符串转换为字节数组
void hexStringToByteArray(const std::string& hexString, unsigned char* byteArray, int length) {
    for (int i = 0; i < length; i++) {
        std::string byteString = hexString.substr(i * 2, 2);
        byteArray[i] = static_cast<unsigned char>(std::stoi(byteString, nullptr, 16));
    }
}

int main() {
    std::string hexString = "48656C6C6F20576F726C64"; // 十六进制字符串
    int length = hexString.length() / 2; // 字节数组长度

    unsigned char* byteArray = new unsigned char[length]; // 创建字节数组

    hexStringToByteArray(hexString, byteArray, length); // 转换为字节数组

    std::ofstream outputFile("output.bin", std::ios::binary); // 创建输出文件流

    outputFile.write(reinterpret_cast<char*>(byteArray), length); // 写入二进制文件

    outputFile.close(); // 关闭文件流

    delete[] byteArray; // 释放内存

    return 0;
}