I wrote about forking a while back, in June 2015. The fork splits a program into two processes, each capable of handling different tasks simultaneously. The power behind this trick is the fork() function.
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The challenge for this month’s Exercise is to split a decimal value into its integer and fractional portions. But what if you need the fractional portion as a string?
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Cleaving a decimal value into its integer and fractional portions is a neat trick, one that relies upon C natural capability to thwack off the decimal portion of a float when it’s recast as an integer. Knowing about this conversion makes solving this month’s Exercise a whole lot easier.
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It was weird when I first saw it: A conditional expression used to determine a value. It sounds odd, but it works.
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A floating point, or real number, has two parts: Before the decimal comes the integer part. After the decimal is the fractional part. Sometimes it’s necessary to split such a value, so that your code can deal separately with the integer and fractional parts.
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Properly formed strings in C are terminated with the null character, \0. Accept it or die!
However . . .
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The critical issue about allocating and then freeing memory is to avoid a memory leak. This condition happens when a memory chunk gets lost, leaving the it lingering in RAM not doing anyone any good. Most often a memory leak occurs in a function.
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One criticism I receive is that my code examples, from both my online training material as well as in my C programming books, fail to free any allocated memory before the program quits. This assertion is correct, and I have a darn good reason why!
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The first post on this blog was made on April 13, 2013.
From last week’s Lesson, I showed how ANSI codes are used to set color text in terminal output. It’s time to go nuts showing the possibilities.
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