用C语言的while循环语句编写1+11+111+1111+11111+··· +11···1...答:include "stdio.h"include "math.h"void main(){ int i=1,n;long sum=0,count=0,a;scanf("%d",&n);while(i<=n){ a=pow(10,i-1);sum=sum+a;count=count+sum;i++;//printf("%d\n",sum); //这里可以输出1,11,111,1111,……} printf("%d\n",count);} //超级简洁的...