计算数列:a,aa,aaa,aaaa,...的前n项的和,a和n由键盘输入 急求这个程序...答:include<stdio.h> include<math.h> int main(){ int a,n;int sum,x=0;scanf("%d%d",&a,&n);sum=0;for(int i=0;i<n;i++){ sum+=a*pow(10,i);x+=sum;printf("%d\n",sum);//输出每一项,可删除;} printf("%d",x);//输出每一项的累加和 } ...