第一种方法
#include<stdio.h>int main(){ int a = 0; scanf("%d", &a); while (a) { printf("%d ",a % 10); a = a / 10; } system("pause"); return 0;}第二种
#include<stdio.h>int main(){ int a = 0; int b = 0; int i = 0; int j = 0; scanf("%d", &i); while (i!=0) { a = i % 10; b = i / 10; i = b; printf("%d\t", a); } system("pause"); return 0;}