将缓冲区转换为十六进制字符串

#include <iostream>
#include <sstream>
#include <iomanip>

std::string bufferToHex(const char* buffer, size_t size) {
    std::ostringstream oss;
    oss << std::hex << std::setfill('0');
    
    for (size_t i = 0; i < size; ++i) {
        oss << std::setw(2) << static_cast<unsigned int>(buffer[i]);
    }
    
    return oss.str();
}

int main() {
    char buffer[] = "Hello, World!";
    size_t bufferSize = sizeof(buffer) - 1; // Exclude null terminator
    
    std::string hexString = bufferToHex(buffer, bufferSize);
    std::cout << hexString << std::endl;
    
    return 0;
}