Question

C语言编程：求Sn=a+aa+aaa+···+aa··a(n个a)的值，其中a和N键盘输入

用当循环做下
麻烦朋友们了

Answer 1

你敢给点分吗？给个50分我就给你写

Answer 2

#include <stdio.h>
int main()
{
int a,n,count=1;
long int sn=0,tn=0;
printf("please input a and n\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);
return 0;
}

Answer 3

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