一、运行结果；

二、源代码；

# define _CRT_SECURE_NO_WARNINGS
# include <stdio.h>int main()
{//初始化变量值；int number = 0;int i = 1;int m = 0;int z = 0;int z1 = 0, z2 = 0, z3 = 0, z4 = 0;//提示用户；printf("请输入一个不多于5位的正整数：");//获取用户输入的数据；scanf("%d", &number);//循环获取数据while (number > 99999 || number < 0){//提示用户printf("您输入的数据不满足条件！！！！\n");printf("请输入一个不多于5位的正整数：");//获取用户输入的数据；scanf("%d", &number);}//赋值；m = number;//循环判断number的位数；while (m > 9){//运算；m = m / 10;//更改变量的值；i++;}//输出结果；printf("%d是%d位数！！！！\n", number, i);//判断每位的数据值，并分别输出每一位数值；switch (i){case 5://运算；z1 = number / 10000;number = number % 10000;//输出数值；printf("万位为%d\n", z1);case 4://运算；z2 = number / 1000;number = number % 1000;//输出数值；printf("千位为%d\n", z2);case 3://运算；z3 = number / 100;number = number % 100;//输出数值；printf("百位为%d\n", z3);case 2://运算；z4 = number / 10;number = number % 10;//输出数值；printf("十位为%d\n", z4);case 1://输出数值；printf("个位为%d\n", number);}//倒序输出每位的数据值；switch (i){case 1://输出；printf("倒序为：%d", number);break;case 2://输出；printf("倒序为：%d%d", number, z4);break;case 3://输出；printf("倒序为：%d%d%d", number, z4, z3);break;case 4://输出；printf("倒序为：%d%d%d%d", number, z4, z3, z2);break;case 5://输出；printf("倒序为：%d%d%d%d%d", number, z4, z3, z2, z1);break;}return 0;
}

三、N-S流程图；