C语言实现求s=a+aa+aaa+aaaa+aa...a的值

#include <stdio.h> #include <conio.h>

int main() { int a, n, count = 1; long int sn = 0, tn = 0;

printf("please input a and n: ");
scanf("%d, %d", &a, &n);
printf("a = %d, n = %d\n", a, n);

while (count <= n) {
    tn = tn + a;
    sn = sn + tn;
    a = a * 10;
    count++;
}

printf("a + aa + ... = %ld\n", sn);
getch();
return 0;

}