编写程序求解sn=a+aa+…+a…a

#include <stdio.h>
int main()
{
int a, n;
scanf("%d%d", &a, &n);
int sum = 0, cur = a;
for(int i = 1; i <= n; i++)
{
sum += cur;
cur = cur * 10 + a;
}
printf("%d", sum);
return 0;
}