題目：給一個(gè)不多于5位的正整數(shù)，要求：一、求它是幾位數(shù)，二、逆序打印出各位數(shù)字。

程序

#include <stdio.h>

int main(void)

{

int a,b,c,d,e,i;

long s;

printf("Please enter a number:");

scanf("%d",&s);

a=s/10000;

b=s/1000%10;

c=s/100%10;

d=s/10%10;

e=s%10;

if(a!=0)

printf("They are 5\n%d %d %d %d %d\n",e,d,c,b,a);

else if(b!=0)

printf("They are 4\n%d %d %d %d\n",e,d,c,b);

else if(c!=0)

printf("They are 3\n%d %d %d\n",e,d,c);

else if(d!=0)

printf("They are 2\n%d %d\n",e,d);

else if(e!=0)

printf("They are 1\n%d\n",e);

return 0;

}

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