Never underestimate the power of the printf() function. It has amazing abilities to format output. And don’t forget about printf()‘s lesser-known cousin, sprintf(). It can do amazing things with strings.
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There is no such word as moduluse, but the C language does feature the modulus operator, %. You can employ that operator do count off intervals, which allows you to manipulate information in a consistent and interesting way.
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You should be familiar with the C language modulus operator, %. Even if that familiarity is fear or confusion it’s still familiarity.
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In late September and early October, I wrote a series of lessons on how the various printf() formatting commands are used. Now it’s time to put your skills to the test.
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The C language features a host of symbols that take on different meanings depending on how they’re used. Unless you’re careful, these operators’ multiple personalities can confuse the bejeebers out of you.
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Either-or decisions are easy. They’re similar to the 1 or 0 of low-level programming: True/False, On/Off, Yes/No. When a third element appears, decision-making becomes more complex. To put it another way: That third element can drive both the programmer and the program crazy.
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I don’t think I’ve ever seen the full lot of printf() conversion characters explained in any detail. This lesson is the last in a series of my attempt to do just that.
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The printf() function’s conversion characters %s and %c seem to be rather straightforward. Or are they?
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When it comes to editing text, the concept of copy and paste is an old one: You select a chunk of text, choose its new location, then paste in the text. The surrounding text jiggles around to make room. Neat and tidy.
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Perhaps the most complex and bizarre things you can format with printf() conversion characters are floating point numbers. The variety of the options can be overwhelming.
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