题解 | 字符串加解密

#include <iostream>
using namespace std;

int main() {
    string str1;
    getline(cin, str1);
    for (char& c : str1) {
        switch (c) {
            case 'A' ... 'Y':
                c += 33;
                break;
            case 'Z':
                c = 'a';
                break;
            case 'a' ... 'y':
                c -= 31;
                break;
            case 'z':
                c = 'A';
                break;
            case '0' ... '8':
                c += 1;
                break;
            case '9':
                c = '0';
                break;
            default:
                break;
        }
    }
    string str2;
    getline(cin, str2);
    for (char& c : str2) {
        switch (c) {
            case 'B' ... 'Z':
                c += 31;
                break;
            case 'A':
                c = 'z';
                break;
            case 'b' ... 'z':
                c -= 33;
                break;
            case 'a':
                c = 'Z';
                break;
            case '1' ... '9':
                c -= 1;
                break;
            case '0':
                c = '9';
                break;
            default:
                break;
        }
    }
    cout << str1 << endl;
    cout << str2 << endl;

    return 0;
}
// 64 位输出请用 printf("%lld")