C语言求e要求分别用while 和do while

!

#include<stdio.h>
int main()
{
double e=1,index;
int i=1,j=1;
do{
i*=j;
index=1.0/i;
e+=index;
j++;
}while(index>=1E-6);
printf("e=%.5f\n",e);
return 0;
}

#include <stdio.h>
int main( )
{
float s = 1, n = 1;int t = 1;
while ( 1 / n >= 0.00001 )
{
s+=1/n;
t++;
n=n*t;
}
printf("%f,n=%d\n", s,t);
return 0;
}