main()
{
int n,i,b;
long a=1;
double e,x;
printf("Input n:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
a*=i;
e+=1.0/a;
}
printf("e=%lf",e);
x=e-(int)e;
printf(" input bit b(1~14):");/*这边给您输出最多14位的小数*/
scanf("%d",&b);
printf("is %ld",(int)(x*pow(10,b)));
}
精确小数的 可以加
do
{
}while(x<0.0000000001);/*数字自己定*/
的代码
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