java练习题2

//题目一：一张纸的厚度大约是0.08mm，对折多少次之后能达到珠穆朗玛峰的高度（8848.13米）？

        int n=1;
        int a=8;
        while(a<=884813000)
        {
            a=a*2^n;
            n++;
        }
        System.out.println(n);
        //题目二：计算5的阶乘 5!的结果是？
        int b =1;
        int c=1;
        while(b<=5)
        {
            c=b*c;
            b++;
            
        }
        System.out.println(c);
        //计算 1+1/2!+1/3!+1/4!+...1/20!=?
        double d =1;
        double e=1;
        double f=0;
        while(d<=20)
        {
            e=(d*e);
            f=1/e+f;
            d++;
            
             System.out.println(f);
             
        }