printf error

i am playing around with printf.

PHP Code:

---

#include <stdio.h>

int main()
{
    int a, b, c;

    printf ("Input 2 integers separated by a comma:\n");
    scanf ("%i %i", &a, &b);
    
    c = a + b;

    if (a == b)
    {
        printf ("%i is equal to %i.\n", a, b);
        printf ("and their sum is even\n");
    }
    else if (a < b)
    {
        printf ("%i is less than %i.\n", a, b);
            if (c%2 == 0)
                printf ("and their summ is even.\n");
            else
                printf ("and their sum is odd.\n");
    }
    else
    {
        printf ("%i is greater than %i.\n", a, b);
            if (c%2 == 0)
                printf ("and their sum is even.\n");
            else
                printf ("and their sum is odd.\n");
    }

        return 0;
} 


---

the problem is that b is always equal to
-858993460..i dont get it...i checked the format specifiers but they are right
thanks

sorry about that..i removed the comma when entering the character, and it worked