c programming read input error checking

Is there a way to make this error checking any better? Or is there something I am forgetting? I am expecting an integer then string. I added the suggestions to the code.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>

int main(void) {
    // your code goes here
    char line[150] = {0};
    int sscanf_counter = 0;
    int num = 0;
    char string[150] = {0};
    char dummy; 

    while(fgets(line, sizeof line, stdin))
    {
        printf("line is %s\n", line);
        sscanf_counter = sscanf(line, "%d %s %c", &num, string, &dummy);
        printf ("sscanf_counter: %d\n", sscanf_counter);
        if (sscanf_counter == 2 && isalpha(string[0])) 
        {
            printf ("Good value: %d\n", num);
            printf ("string: <%s>\n", string);
        }
        else 
        {
            printf ("BAD VALUE: %d \n", num);
            printf ("string: <%s>\n", string);
        }
        memset(line, 0, sizeof line);
    }

    printf("Does this print? \n");

    return 0;
}

I didn't want 222 to be converted to a string so I added a simple isalpha() check to my code. I want an actual number for my first value and actual alphabet characters not numbers converted to a string for the second value.

Output with small tweak:

aaa aaa
line is aaa aaa

sscanf_counter: 0
BAD VALUE: 0
string: <>
111 222
line is 111 222

sscanf_counter: 2
BAD VALUE: 111
string: <222>
111 aaa
line is 111 aaa

sscanf_counter: 2
Good value: 111
string: <aaa>