#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>
<p>std::string bytesToHex(const std::vector<unsigned char>& data) {
std::stringstream hexStream;
hexStream << std::hex << std::setfill('0');
for (unsigned char byte : data) {
hexStream << std::setw(2) << static_cast<int>(byte);
}
return hexStream.str();
}</p>

std::string bytesToHexFast(const std::vector<unsigned char>& data) {
    const char* hexChars = "0123456789abcdef";
    std::string result;
    result.reserve(data.size() * 2); // 预分配空间
<pre class='brush:php;toolbar:false;'>for (unsigned char byte : data) {
    result.push_back(hexChars[byte >> 4]);     // 高四位
    result.push_back(hexChars[byte & 0x0F]);   // 低四位
}
return result;

}

智能Pr插件，融入众多AI功能和海量素材

#include <iiostream>
#include <vector>
#include <string>
<p>// 此处插入bytesToHex或bytesToHexFast函数</p><p>int main() {
std::vector<unsigned char> binary = {0x1A, 0xFF, 0x00, 0x4B};
std::string hexStr = bytesToHexFast(binary);
std::cout << "Hex: " << hexStr << std::endl; // 输出: 1aff004b
return 0;
}</p>