求教大神如何用c语言编写程序:输入100到n的数,输出各位数的和为9的...答:int main(){ int re,x,i,j,sum,s;printf("请输入一个数");scanf("%d",&x);if (x>=100) { for (i=100,sum=0;i<=x;i++) { for (s=0,j=i;j!=0;) { re=j%10;s=s+re;j=j/10;} if (s==9) { printf("%d ",i);sum=sum+i;} } } printf("\n The sum ...