ugly_array.c

#include <stdio.h>

int main(){
    unsigned long reference_number =  60000;
    unsigned long phone_numbers[65535];
    printf( "%lu\n", sizeof(phone_numbers));
    phone_numbers[reference_number] = 1;
    if ( phone_numbers[reference_number]==1){
        printf("Match on = %lu\n", reference_number);
    }
    return 1;
}