doubles don't work!!!!!!!

I downloaded both the newest (12.I forget) and 10.05 versions of codeblocks on my windows 7 64bit laptop. Whenever I try and do any sort of operation with a double type variable (print, scan, any sort of math), even if it is initialized to something, the result always comes up as 0.00000000. Anyone got any ideas?

for example

double i = 9.4;
printf ("%lf", i);

prints 0.0000000 :confused:

Don't use %lf with printf. Just use %f for both float and double.
scanf needs %lf for a double, though.

Quote:

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Originally Posted by oogabooga

Don't use %lf with printf. Just use %f for both float and double.
scanf needs %lf for a double, though.

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That's correct. It really shouldn't matter though.

OP, please submit a complete snippet that is compilable and exhibits the problem you're observing.

E.g.

Code:

---

#include <stdio.h>

int main(void)
{
    double i = 9.4;
    printf ("%lf", i);
    return 0;
}

---

You're right of course that it shouldn't matter, but sadly it does on gcc 4.7.1, at least. :(
The ell should just be ignored, but instead it gets weird.
E.g., your code snippet just prints 0.00000000.
I guess it's a bug.
EDIT: Just did a quick test. Apparently gcc (4.7.1, at least) interprets a small ell as a capital ell, i.e., if you make i a long double, it prints correctly.

Quote:

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Originally Posted by oogabooga

You're right of course that it shouldn't matter, but sadly it does on gcc 4.7.1, at least. :(
The ell should just be ignored, but instead it gets weird.
E.g., your code snippet just prints 0.00000000.
I guess it's a bug.
EDIT: Just did a quick test. Apparently gcc (4.7.1, at least) interprets a small ell as a capital ell, i.e., if you make i a long double, it prints correctly.

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Weird. It's not undefined behaviour... it's defined as having no effect

Quote:

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.... has no effect on a following a, A, e, E, f, F, g, or G conversion specifiers.

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Must be gcc bug.

For the snippet I provided, gcc 4.8.2 prints 9.400000

I tried all the changes you guys suggested but still no luck. I was wondering, is it possible that my anti-virus might have stopped a part of codeblocks from downloading? I scrolled through the logs and it didn't mention anything. Also I would expect an error from codeblocks if it was missing some of its self.

No, that's not possible. You're just doing something wrong. Try this:

Code:

---

#include <stdio.h>
 
int main(void)
{
    double d = 9.4;
    printf ("%f\n", d);
    return 0;
}

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