C语言编写：求Sn=a+aa+aaa+…+aa…a n个a之值

l#include "stdio.h"
int main()
{
long i,j,a,n,sn = 0,sum = 0; /* sn为每一个a的值,sum为总值*/
scanf("%d%d",&a,&n);
for(i = 1; i