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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I was blown away by the elegance and simplicity of the Babylonian Method to calculate a square root, which is the topic of this month’s Exercise. I only hope that my solution lives up the challenge, lest I suffer the fate of the Assyrians.
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Your C programs’ text output need not be so dull. Aside from adding wide characters, you can spice things up with color text. The terminal flavor is what determines the color palette. All you need to know are the secret codes that activate and deactivate the attributes.
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