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);

}