用循环语句解决问题，判断数的位数

Question

从键盘上输入一个整数，判断是几位数，并逆序输出

Answer 1

#include<stdio.h> void main() { int i,n; do{ printf("请输入一个正整数："); scanf("%d",&n); if(n<=0) { printf("数据错误，请重新输入!!\n"); } }while(n<=0); printf("逆序输出:"); for(i=0;n>0;i++) { printf("  %d",n%10); n=n/10; } printf("\n这是一个%d位数\n",i); }

Answer 2

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