#include<stdio.h>
 
int main(){
    int a,b,c,d,e,n;
    printf("请输入一个不多于5位数的正整数： ");
    scanf("%d",&n);
    a=n/10000;  //万位
    b=n%10000/1000; //千位
    c=n%1000/100;   //百位
    d=n%100/10; //十位
    e=n%10;  //个位
 
    if(a!=0)
        printf("%d是5位数，逆序各位分别是：%d,%d,%d,%d,%d",n,e,d,c,b,a);
    else if(b!=0)
        printf("%d是4位数，逆序各位分别是：%d,%d,%d,%d",n,e,d,c,b);
    else if(c!=0)
        printf("%d是3位数，逆序各位分别是：%d,%d,%d",n,e,d,c);
    else if(d!=0)
        printf("%d是2位数，逆序各位分别是：%d,%d",n,e,d);
    else
        printf("%d是1位数，逆序各位分别是：%d",n,e);
    return 0;
}

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