中文octave安装教程

加密程序：

#include <iostream>
using namespace std;

int main() {
    int num;
    cout << "请输入明码：";
    cin >> num;
    
    int digit1 = (num / 100000 + 7) % 10;
    int digit2 = (num / 10000 % 10 + 7) % 10;
    int digit3 = (num / 1000 % 10 + 7) % 10;
    int digit4 = (num / 100 % 10 + 7) % 10;
    int digit5 = (num / 10 % 10 + 7) % 10;
    int digit6 = (num % 10 + 7) % 10;
    
    int cipher = digit6 * 100000 + digit5 * 10000 + digit4 * 1000 + digit3 * 100 + digit2 * 10 + digit1;
    cout << "密码为：" << cipher << endl;
    
    return 0;
}

解密程序：

#include <iostream>
using namespace std;

int main() {
    int cipher;
    cout << "请输入密码：";
    cin >> cipher;
    
    int digit1 = (cipher % 10 + 3) % 10;
    int digit2 = (cipher / 10 % 10 + 3) % 10;
    int digit3 = (cipher / 100 % 10 + 3) % 10;
    int digit4 = (cipher / 1000 % 10 + 3) % 10;
    int digit5 = (cipher / 10000 % 10 + 3) % 10;
    int digit6 = (cipher / 100000 + 3) % 10;
    
    if (digit1 < 0 || digit2 < 0 || digit3 < 0 || digit4 < 0 || digit5 < 0 || digit6 < 0) {
        cout << "解密错误！" << endl;
        return 0;
    }
    
    int num = digit1 * 100000 + digit2 * 10000 + digit3 * 1000 + digit4 * 100 + digit5 * 10 + digit6;
    cout << "明码为：" << num << endl;
    
    return 0;
}