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While using sprintf like this

sprintf("%.40s",str);

I want to give a value like strlen(str) in place of 40.How do I do that? I tried replacing 40 with strlen(str), doesn't work. giving a value like

#define len strlen(str)

and using %.len doesnt work either since %.len is in "".

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need to try out if #define return strlen(str); works – Anurag Nov 7 '12 at 17:59
Hi and Welcome to AskUbuntu. We love ubuntu specific programming questions. This is more generic - it should be asked on StackOverflow itself. – fossfreedom♦ Nov 7 '12 at 20:03

closed as off topic by Jai, belacqua, fossfreedom♦ Nov 7 '12 at 20:02

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