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something is not right in sprintf function ?

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Posted by xianju wang

on Mar 30 2012 10:33 AM

Prodigy10 points

I have a code like below:

int a; char cc[8];

a=1;

sprintf(cc,"%03ld",a);---->version 1

then cc[2]='2'.

if I use sprintf(cc,"%03ld", (long)a); --->version 2

then cc[2]='1'. that is what I expect.

My CCS version is 3.3.81.6. Do you have to cast before using sprint ?

Thanks.

Xianju

All Replies

Posted by Alberto Chessa

on Apr 03 2012 08:09 AM

Verified Answer

Verified by xianju wang

Genius3740 points

Hi,

This could depend on the int and long representation of your target machine and compiler implementation.

Is sizeof(int)==sizeof(long) ?

Have you already tried "%03d" (without the 'l')?

Posted by Archaeologist

on Apr 03 2012 10:39 AM

Mastermind40550 points

Alberto has the right answer here. Note that even if "int" and "long" have the same representation, a program which passes "int" to printf where a "long" is expected is not a strictly conforming program.

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