给一个数，用vc++如何求出它是几位数

1、编辑内容如下：#include<stdio.h>#include<math.h>int main(像粜杵泳){ int x,a,b,c; b=0; printf("请输入一个数："); scanf("%d",&x); c=x; do {a=x%10; x=x/10; b++; switch(b) { case 1:printf("该数个位是:%d\n",a);break; case 2:printf("该数十位是:%d\n",a);break; case 3:printf("该数百位是:%d\n",a);break; case 4:printf("该数千位是:%d\n",a);break; case 5:printf("该数万位是:%d\n",a);break; case 6:printf("该数十万位是:%d\n",a);break; }

3、{a=c%10; c=c/10; switch(b) { case 1:printf("%d\n",a);break; case 2:printf("%d",a);break; case 3:printf("%d",a);break; case 4:printf("%d",a);break; case 5:printf("%d",a);break; case 6:printf("%d",a);break; } b--;}while(b>0);return 0;}