2015.10.22

#include<stdio.h>

main()

{

long int p;

int n;

double q;

printf("--------------------------------------------------------------------\n");

printf("2 to power n                       n                     2 to power -n\n");

printf("--------------------------------------------------------------------\n");

p=1;

for(n=0;n<21;++n)

{

    if(n==0)

        p=1;

    else p=p*2;    

q=1.0/(double)p;

    printf("%101d %10d %20.12lf\n",p,n,q);

}

printf("-------------------------------------------------------------------------\n");

int a;

scanf("%d",&a);

if(a%4==0&&a%100!=0||a%400==0)

    printf("是闰年");

else printf("不是闰年");

}

2015.10.22

原文：http://www.cnblogs.com/haogong10333/p/4905242.html