I don't understand what problem is it


#include <stdio.h>
#include <math.h>

int main()
{
    long double i[10000] = {0};
    int c,tmp,j=0;
    while ((c = getchar()) != EOF)
    {
        if ( (c != ' ') && ( c != '\n' ) && ( c != '\t' ) && ( c != '\0' ) )
        {
            i[j] = i[j]*10 + ((int)c - 48) ;
        }
        if ( ( tmp!=' ' && tmp!='\n' && tmp!='\t' && tmp!='\0' ) && ( c == '\0' || c==' ' || c=='\n' || c=='\t' ) )
            j++;
        tmp = c;
    }
    for ( j-- ; j>=0 ; j--)
    {
        printf("%Lf\n", sqrtl(i[j]));
    }
    return 0;
}

What is about the test 3 ?

first:temp used without being initialized
second:when do the while end up if I just put in 3 numbers