Sixty years ago, on May 1, 1964, at 4 am in the morning, a quiet revolution in computing began at Dartmouth College. That’s when mathematicians John G. Kemeny and Thomas E. Kurtz successfully ran the ...

“Basic C programming,” is an online Wikibooks resource. It is a good step up from another Wikibooks resource: “A little C primer.” It is a complete online text book that takes comprehensive look at ...

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The main problem you're having is that strlen calculates the length of the string data already in the string you give it. out is not initialized when you pass it to strlen so the result is undefined.