Запрет ввода определённых символов в scanf

#include <stdio.h>
 
void main()
 
{
    //define types of constants
    long int inputnumber, reversenumber = 0, tempnumber = 0;
    //print message to user with correct input instructions
    printf("Please input positive integer number\nthat contanits up to 5 digits 1-9 [besides 0]: ");
    //input number to constanr number
 
    scanf("%ld", &inputnumber);
    
    tempnumber = inputnumber;
    if (inputnumber > 0 && inputnumber < 100000)
    {
        while ((inputnumber > 0) && (inputnumber < 100000))
        {
            reversenumber = reversenumber * 10 + inputnumber % 10;
            inputnumber = (inputnumber - (inputnumber % 10)) / 10;
        }
        if (tempnumber == reversenumber)
            printf("Your number is Polindrome\n");
        else
            printf("Your number is not Polindrome\n");
    }
    else printf("Incorrect input\n");
 
}

#include <stdio.h>
 
void main()
 
{
    //define types of constants
    long int inputnumber, reversenumber = 0, tempnumber = 0,i,check0,count;
    //print message to user with correct input instructions
    printf("Please input positive integer number\nthat contanits up to 5 digits 1-9 [besides 0]: ");
    //input number to constant
 
    scanf("%ld", &inputnumber);
    //put inputnumber value into tempnumber for futher comparasion
    tempnumber = check0 = inputnumber;
    //putinputnumber into 
    //count number of 0 in entered number, set start value to 0
    count = 0;
    //start loop from i=0 to i=entered number, check if entered number modulu 10 = 0, if yes count 1 to count for every 0 in number.
    for (i = 0; i<inputnumber; i++) {
        while (check0>0) {
            if (check0 % 10 == 0) count += 1;
            check0 = check0 / 10;
        }
    }
    //check if countered at least 1 zero in entered number print message that prohibited 0 wase entered
    if (count != 0)
        printf("Your number contain prohibited digit 0\n");
    else
    
    //if number not contains 0, check that is positive and maximum 5 digit number
    if (inputnumber > 0 && inputnumber < 100000)
    {
        //if entered correct number, reverse entered number i.ex 123->321 
        while ((inputnumber > 0) && (inputnumber < 100000))
        {
            reversenumber = reversenumber * 10 + inputnumber % 10;
            inputnumber = (inputnumber - (inputnumber % 10)) / 10;
        }
        //now check if entered number(tempnumber=inputnumber) = to reversed number, if yes print message that number is polindrome
        if (tempnumber == reversenumber)
            printf("Your number is Polindrome\n");
        else
        //if not, print Not polindrome
            printf("Your number is not Polindrome\n");
    }
    //if entered incorrect non positive  and not 5 digit number, print this message
    else printf("Incorrect input\n You entered more than 5 digits or prohibited symbol\n");
 
}