用C语言求解:输入一个三位或者五位数,用逆序或者正序输出每一位数答:include <stdio.h> int main(){ int a;printf("输入一个三位的正整数\n");scanf("%d",&a);if (a<=999&&a>99){ printf("三位数各位数字是:%d,%d,%d\n",a/100,(a%100)/10,(a%100)%10);printf("按逆序输入是:%d%d%d\n",(a%100)%10,(a%100)/10,a/100);} else p...