Pset1:credit - converting a long to a string causes a segfault?

Question

I keep getting a segfault, and help50 doesn't help. A lot of head scratching an googling later, I think I've narrowed it down to: you can't convert a long to a string. Is that true? The code in question:

#include <stdio.h>
#include <cs50.h>

int main(void)
{
    long card = get_long("Number: ");
    string card_str = (string) card;

    printf("Card long %i\n", card);
    printf("Card string %c\n", card_str[1]);
}

When run, I get:

~/pset1/credit/ $ ./credit 
Number: 100
Card long 100
Segmentation fault

Answer 1

As you do, you can't. I would try something like this, it might work:

#include <stdio.h>
#include <cs50.h>

int main(void)
{
    long card = get_long("Number: ");
    char card_str[256];
    sprintf(str, "%ld", card);

    printf("Card long %li\n", card);
    printf("Card string %c\n", card_str[1]);
}