题目3
代码:
package test3_18;
public class test2 {
public static void main(String[] args) {
int fenMu = (int) Math.pow(2,19);
int fenZi = 0;
double sum = 0;
for(int i=0;i<20;i++){
fenZi += Math.pow(2,i);
}
System.out.printf("%d/%d\n",fenZi,fenMu);
}
}