c++ - C++转义控制字符

是否有C ++函数来转义字符串中的控制字符？例如，如果输入为"First\r\nSecond"，则输出应为"First\\0x0D\\0x0ASecond"。

最佳答案

我还没有听说过，但是实现它应该相对容易一些：

unordered_map<char, string> replacementmap;
void initreplecementmap() {
    replacementmap['\''] = "\\0x27";
    replacementmap['\"'] = "\\0x22";
    replacementmap['\?'] = "\\0x3f";
    replacementmap['\\'] = "\\\\";
    replacementmap['\a'] = "\\0x07";
    replacementmap['\b'] = "\\0x08";
    replacementmap['\f'] = "\\0x0c";
    replacementmap['\n'] = "\\0x0a";
    replacementmap['\r'] = "\\0x0d";
    replacementmap['\t'] = "\\0x09";
    replacementmap['\v'] = "\\0x0b";
}

string replace_escape(string s) {
    stringstream ss;

    for (auto c: s) {
        if (replacementmap.find(c) != replacementmap.end()) {
            ss << replacementmap[c];
        } else {
            ss << c;
        }
    }
    return ss.str();
}

关于c++ - C++转义控制字符，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30242577/