第四周作业

package first;
/*
 * 纯随机数发生器
 * 生成1000个随机整数
 */
public class TestRandom {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        long seed = System.currentTimeMillis();// 种子
        int i;
        int count = 0;
        // Modulus=231-1=int.MaxValue
        // Multiplier=75=16807
        long random = (16807 * seed) % Integer.MAX_VALUE;
        for (i = 1; i <= 1000; i++) {
            random = (16807 * random) % Integer.MAX_VALUE;
            System.out.print(random + " ");
            count++;
            if (count % 5 == 0)
                System.out.println();
        }
    }
}

　　

动手动脑二

package first;

public class MethodOverload {

    public static void main(String[] args) {
        System.out.println("The square of integer 7 is " + square(7));
        System.out.println("
The square of double 7.5 is " + square(7.5));
    }

    public static int square(int x) {
        return x * x;
    }

    public static double square(double y) {
        return y * y;
    }
}