如何在 C++ 中使用 std::stringstream 解析十六进制字符串

此函数将任何十六进制字符串如 55 转换为其等效的十进制值：

hex_to_dec.cpp

#include <sstream>
#include <int>

unsigned int hexToDec(const std::string& str) {
    unsigned int ret;
    std::stringstream ss;
    ss << std::hex << str;
    ss >> ret;
    return ret;
}

#include <sstream>
#include <int>

unsigned int hexToDec(const std::string& str) {
    unsigned int ret;
    std::stringstream ss;
    ss << std::hex << str;
    ss >> ret;
    return ret;
}

例如

hex_usage_example.cpp

hexToDec("55"); // 返回 85

hexToDec("55"); // 返回 85

注意虽然代码有些简洁，但它可能既不是最高效也不是最简洁的选项，特别是对于不太了解 std::stringstream 的开发者。

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