程序代码：

[code]#include<stdio.h>
main()
{
int num;
printf("please input a number less than 99999 and more than 0\n");
scanf("%d",num);
if (num<=9)printf("1 place");
else if (num>=10,num<=99)printf("2 place");
else if (num<=999)printf("3 place");
else if (num<=9999)printf("4 place");
else if (num<=99999)printf("5 please");
return 0;

}

程序代码：

#include<stdio.h>
main()
{
int num,place;
printf("please input a number less than 99999 and more than 0\n");
scanf("%d",num);
if (num<=9)place=1;
else if (num>=10,num<=99)place=2;
else if (num>=100,num<=999)place=3;
else if (num>=1000,num<=9999)place=4;
else if (num>=10000,num<=99999)place=5;
printf("place=%d",place);
return 0;

}

程序代码：

int main()
{
    int num;
    printf("please input a number less than 99999 and more than 0:\n");
    scanf("%d",&num);
    int oldnum=num;
    int digit=0;
    while(num>0)
    {
        num=num/10;
        digit++;
    }
    printf("%d的位数是%d.\n",oldnum,digit);
    return 0;

} 

程序代码：

int num;
    printf("please input a number less than 99999 and more than 0\n");
    scanf("%d",&num);
    if (num<=9)printf("1 place");
    else if (num>=10 && num<=99) printf("2 place");
    else if (num>=100 && num<=999) printf("3 place");
    else if (num>=1000 && num<=9999) printf("4 place");
    else if (num>=10000 && num<=99999) printf("5 please");
    return 0;

程序代码：

#include<stdio.h>

int main()
{
    int num = 0;
   
    printf("please input a number less than 99999 and more than 0\n");
   
    scanf("%d", num);
        {
        if (num > 0, num <= 9)
            printf("1 place");
            else if (num >= 10, num <= 99)
            printf("2 place");
            else if (num >= 100, num <= 999)
            printf("3 place");
            else if (num >= 1000, num <= 9999)
            printf("4 place");
            else if (num >= 10000, num <= 99999)
            printf("5 please");

        }
return 0;
}

程序代码：

#include<stdio.h>

int main()
{
    int num = 0;
   
    printf("please input a number less than 99999 and more than 0\n");
   
    scanf("%d", &num);
        {
        if (num > 0, num <= 9)
            printf("1 place\n");
            else if (num >= 10, num <= 99)
            printf("2 place\n");
            else if (num >= 100, num <= 999)
            printf("3 place\n");
            else if (num >= 1000, num <= 9999)
            printf("4 place\n");
            else if (num >= 10000, num <= 99999)
            printf("5 please\n");

        }
return 0;
}