Assigning large value

hi i m new here!! now i got a problem ... I need a number not less than 13digits to assign to a variable. which data type should i use? i tried, (it might be wrong), "long long int " n still i got stuck!! help me out :(

long long int will gladly handle numbers above 13 digits.
If it does not work, then show us your code and tell us what compiler you use.
Also try
printf("%d", sizeof(long long int));
and tell us what it prints.

a long long int contains 64bit so there is a number range of 9223372036854775807 to -9223372036854775807.
13 digits shouldn't be problem for long long int.

i m using gcc v4.1.2. and my piece of code is like this
<code>
long long int x= 13131313131313;
printf("%lld", x); // have also tried %ld.
</code>

And sizeof says 8.

Code:

---

#include <stdio.h>

int main()
{
        unsigned long long ll = 0xFFFFFFFFFFFFFFFF;
        printf("%llX\n", ll);
        return 0;
}

---

Output: FFFFFFFFFFFFFFFF

Code:

---

#include <stdio.h>

int main()
{
        unsigned long long ll = 0xFFFFFFFFFFFFFFFF;
        printf("%llu\n", ll);
        return 0;
}

---

Output: 18446744073709551615

I m so sorry for my stupidity!!! actually i am using lots of C compiler. I am currently using Dev-C++ 4.9.9.2 and i found out that it uses gcc v3.4.2 (mingw-special). (Sorry for losing your time). I tried your last code with this compiler and it prints 4294967295. help me out !!!!

That is becasue gcc-mingw uses an older C-library, so the printf format for long long is "%I64d" rather than "%lld".

--
Mats

Thank you very much!!! It works .... but may i know what is this "%I64d"... where can i learn more about format specifiers??? ;) Thank you!!

Quote:

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Originally Posted by HzTzr

Thank you very much!!! It works .... but may i know what is this "%I64d"... where can i learn more about format specifiers??? ;) Thank you!!

---

You may want to have a look here:
http://msdn.microsoft.com/en-us/libr...dc(VS.71).aspx

for example. Since gcc-mingw is using Microsoft's C library, the relevant generation of the MSDN documentation is what you need - I'm not sure if that's the exact right version, but it's at least 99% right.

--
Mats

Thanks again... a LOT Mr. Kernel hacker :)!! n many thanks to Elysia too!!! I m feeling much better now!!!

Strange that gcc would not support "standard" format specifiers? At least I believe they are standard.

Quote:

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Originally Posted by Elysia

Strange that gcc would not support "standard" format specifiers? At least I believe they are standard.

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gcc disclaims all responsibility for msvcrt.dll (or whatever it's called these days).

But MS's printf DOES support llx or llu (the newer versions).
So if GCC uses an old library, then I blame GCC.

Quote:

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Originally Posted by Elysia

Strange that gcc would not support "standard" format specifiers? At least I believe they are standard.

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In C99, yes. HzTzr, compile your program with the -std=c99 option.

Quote:

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Originally Posted by Elysia

But MS's printf DOES support llx or llu (the newer versions).
So if GCC uses an old library, then I blame GCC.

---

Only because the gcc-mingw maintainers hasn't produced a (stable) version of gcc-mingw for later versions than 3.4.x. But of course, it is still not GCC's fault for what is in a third party library, any more than it is the fault of a game that a particular implementation of OpenGL causes bad drawing on particular models of graphics card, right?

After all, the COMPILER can not fix the libraries it links to.

--
Mats