求Sn=a+aa+aaa+...+aaaa..a是一位数字，n代表a的位数

#include<stdio.h>
int main()
{
    int sum,a,n;
    int san(int a,int n);
    scanf("%d %d",&a,&n);
    sum=san(a,n);
    printf("%d",sum);
    return 0;


}
int san(int a, int n)
{
    int sum,team;
    sum=team=a;
    for(int i=1;i<n;i++)
    {

        team=team*10+a;
        sum+=team;

    }
    return sum;
}