pulnene na maika ti potkata

#include <stdio.h>

int main()
{
    char holder[100],c;
    int counter = 0;
    while((c=getchar()) != EOF)
    {
        switch(c)
        {
            case '0'...'9':
            holder[counter] = c;
            break;
            case ' ':
            space = counter;
            break;
        }
        counter++;
    }
    return 0;
}