题解 | #字符串加解密#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void (async function () {
    // Write your code here
    let arr = [];
    rl.on("line", function (line) {
        arr.push(line);
    }).on("close", function () {
        console.log(encryption(arr[0]));
        console.log(decryption(arr[1]));
        function encryption(str) {
            let list = str.split("");
            for (let i = 0; i < list.length; i++) {
                if (list[i].match(/[A-Z]/)) {
                    list[i] =
                        list[i] == "Z"
                            ? "a"
                            : String.fromCharCode(
                                  list[i].toLowerCase().charCodeAt(0) + 1
                              );
                } else if (list[i].match(/[a-z]/)) {
                    list[i] =
                        list[i] == "z"
                            ? "A"
                            : String.fromCharCode(
                                  list[i].toUpperCase().charCodeAt(0) + 1
                              );
                } else if (list[i].match(/[0-9]/)) {
                    list[i] =
                        list[i] == "9"
                            ? "0"
                            : (parseInt(list[i]) + 1).toString();
                }
            }
            return list.join('')
        }
        function decryption(str) {
            let list = str.split("");
            for (let i = 0; i < list.length; i++) {
                if (list[i].match(/[A-Z]/)) {
                    list[i] =
                        list[i] == "A"
                            ? "z"
                            : String.fromCharCode(
                                  list[i].toLowerCase().charCodeAt(0) - 1
                              );
                } else if (list[i].match(/[a-z]/)) {
                    list[i] =
                        list[i] == "a"
                            ? "Z"
                            : String.fromCharCode(
                                  list[i].toUpperCase().charCodeAt(0) - 1
                              );
                } else if (list[i].match(/[0-9]/)) {
                    list[i] =
                        list[i] == "0"
                            ? "9"
                            : (parseInt(list[i]) - 1).toString();
                }
            }
             return list.join('')
        }
    });
})();