#include<unistd.h>

void ft_print_comb(void);
int dcount[10] = {0};  // 10 ints, all initialized to 0

while(num) {
        dcount[num % 10]++;   // increment dcount[i], where i is the last digit of num
        num /= 10;            // "remove" last digit from num
}

for (int i = 0; i < sizeof(dcount)/sizeof(dcount[0]); i++)
        printf("%d occured %d times\n", i, dcount[i]);