mima.java

一个JAVA小程序

public class Mima {
	// 每位数字都加上5,然后用和除以10的余数代替该数字，再将第一位和第四位交换，第二位和第三位交换，求加密算法和解密放法

	public void fun(int s) {
		int a;
		int b;
		int c;
		int d;
		// *********************************************
		a = s / 1000;
		b = (s - a * 1000) / 100;
		c = (s - a * 1000 - b * 100) / 10;
		d = s - a * 1000 - b * 100 - c * 10;
		// *********************************************
		a = (a + 5) % 10;
		b = (b + 5) % 10;
		c = (c + 5) % 10;
		d = (d + 5) % 10;
		// *********************************************
		a = a + d;
		d = a - d;
		a = a - d;
		b = b + c;
		c = b - c;
		b = b - c;
		System.out.println(a + "" + b + "" + c + "" + d);

	}

	public static void main(String[] args) {
		Mima m = new Mima();
		m.fun(5829);

	}
}