printing numbers starting with 0 in struct

I need to make a struct that contains a long for student id. In my case, my student id is 0xxxxxxx

my code looks like this:

Code:

---

struct student {
                char *name;
                int age;
                long int id;
                float gpa;};

int main(int argc, char *argv[])

{
        struct student student1 = {"name",xx,0xxxxxxx,x.x};

        printf("%s\n",student1.name);
        printf("%i\n",student1.age);
        printf("%i\n",student1.id);
        printf("%.1f\n",student1.gpa);
}

---

When I try to compile it, I get an octal constant error, which, or course, I don't want. So is there any way I can get this to work?

Also, a less important question. My full id actually starts "A", but since the teacher wants me to use long, it can't be helped, right?

Oh, and I am very new to C, so I'm aware that my code is probably horribly inefficient. Any tips would be appreciated. Thanks.

Code:

---

struct student student1 = {"name",xx,0xxxxxxx,x.x};

---

Try

Code:

---

struct student s1 = {"Joe", 10, 10000, 0.0};

---

A long can store a number - XXX isn't a number.

Any number starting with 0 (like 0315) (except 0 itself) is an octal number.

Any number starting with 0x (like 0xFF, or 0x4fAa4) is a hexadecimal (hex) number.

The standard Windows calculator can convert between these formats.

You don't have to initialize a struct. You can do that later:

Code:

---

struct student s1;

/* ... */

strcpy(s1.name, "hippo");

---

[edit]
Actually, you would need to use malloc, since student::name is a pointer, not a character array:

Code:

---

s1.name = malloc(6);
strcpy(s1.name, "hippo");
/*...*/
free(s1.name);

---

[/edit]

I can't seem to type 0 first into the calculator.
And the xxx was supposed to represent numbers, since I didn't want to post the actual numbers. Sorry if there was any confusion, I don't know the syntax.

Quote:

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I can't seem to type 0 first into the calculator.

---

Of course not. Look, go into Scientific mode. On the upper left will be an Oct button. Click it.

Quote:

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And the xxx was supposed to represent numbers, since I didn't want to post the actual numbers.

---

Of course, sorry. It's just telling you that you're using an octal number.

The "constant error" could be due to this:

Code:

---

char *name;

---

Make it

Code:

---

char name[30];

---

and see what happens.

Nothing different happens when I change the char part, so I think the problems stems only from the octal error. And I went to scientific mode and clicked the oct button, but I still can't put 0 first. ArGhh. Ok, say my id is 06688363. What would it convert to and how did you get it?

If you're in Octal mode, the numbers are automatically octal. Type a number, then click on "Dec" to convert it to decimal.

wait wait. I'm confused.

what I'm trying to do is get an output of 06688363
that's my decimal.

So what I have to do is convert 06688363 to octal so I can put the octal into the code, so it'll print out 06688363 when I run the program, right?

No. You can't have an integer hold a number like 06688363. It will become 6688363. Use a string or something.

ok, I think I got it. Thanks for your quick and frequent :rolleyes: help. I really appreciate it.